diff --git a/lib/cookie.c b/lib/cookie.c
index 9deeb1ac4..c59732672 100644
--- a/lib/cookie.c
+++ b/lib/cookie.c
@@ -815,7 +815,7 @@ Curl_cookie_add(struct SessionHandle *data,
   if(c->running)
     /* Only show this when NOT reading the cookies from a file */
     infof(data, "%s cookie %s=\"%s\" for domain %s, path %s, "
-          "expire %" FORMAT_OFF_T "\n",
+          "expire %" CURL_FORMAT_CURL_OFF_T "\n",
           replace_old?"Replaced":"Added", co->name, co->value,
           co->domain, co->path, co->expires);
 
@@ -1172,7 +1172,7 @@ static char *get_netscape_format(const struct Cookie *co)
     "%s\t"   /* tailmatch */
     "%s\t"   /* path */
     "%s\t"   /* secure */
-    "%" FORMAT_OFF_T "\t"   /* expires */
+    "%" CURL_FORMAT_CURL_OFF_T "\t"   /* expires */
     "%s\t"   /* name */
     "%s",    /* value */
     co->httponly?"#HttpOnly_":"",
diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index 7edeca212..62ea92199 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -139,29 +139,6 @@
    Error Compilation_aborted_SIZEOF_CURL_OFF_T_shall_not_be_defined
 #endif
 
-/*
- * Set up internal curl_off_t formatting string directives for
- * exclusive use with libcurl's internal *printf functions.
- */
-
-#ifdef FORMAT_OFF_T
-#  error "FORMAT_OFF_T shall not be defined before this point!"
-   Error Compilation_aborted_FORMAT_OFF_T_already_defined
-#endif
-
-#ifdef FORMAT_OFF_TU
-#  error "FORMAT_OFF_TU shall not be defined before this point!"
-   Error Compilation_aborted_FORMAT_OFF_TU_already_defined
-#endif
-
-#if (CURL_SIZEOF_CURL_OFF_T > CURL_SIZEOF_LONG)
-#  define FORMAT_OFF_T  "lld"
-#  define FORMAT_OFF_TU "llu"
-#else
-#  define FORMAT_OFF_T  "ld"
-#  define FORMAT_OFF_TU "lu"
-#endif
-
 /*
  * Disable other protocols when http is the only one desired.
  */
diff --git a/lib/file.c b/lib/file.c
index e658ada0a..043cccd47 100644
--- a/lib/file.c
+++ b/lib/file.c
@@ -152,14 +152,14 @@ static CURLcode file_range(struct connectdata *conn)
     if((-1 == to) && (from>=0)) {
       /* X - */
       data->state.resume_from = from;
-      DEBUGF(infof(data, "RANGE %" FORMAT_OFF_T " to end of file\n",
+      DEBUGF(infof(data, "RANGE %" CURL_FORMAT_CURL_OFF_T " to end of file\n",
                    from));
     }
     else if(from < 0) {
       /* -Y */
       data->req.maxdownload = -from;
       data->state.resume_from = from;
-      DEBUGF(infof(data, "RANGE the last %" FORMAT_OFF_T " bytes\n",
+      DEBUGF(infof(data, "RANGE the last %" CURL_FORMAT_CURL_OFF_T " bytes\n",
                    -from));
     }
     else {
@@ -167,12 +167,13 @@ static CURLcode file_range(struct connectdata *conn)
       totalsize = to-from;
       data->req.maxdownload = totalsize+1; /* include last byte */
       data->state.resume_from = from;
-      DEBUGF(infof(data, "RANGE from %" FORMAT_OFF_T
-                   " getting %" FORMAT_OFF_T " bytes\n",
+      DEBUGF(infof(data, "RANGE from %" CURL_FORMAT_CURL_OFF_T
+                   " getting %" CURL_FORMAT_CURL_OFF_T " bytes\n",
                    from, data->req.maxdownload));
     }
-    DEBUGF(infof(data, "range-download from %" FORMAT_OFF_T
-                 " to %" FORMAT_OFF_T ", totally %" FORMAT_OFF_T " bytes\n",
+    DEBUGF(infof(data, "range-download from %" CURL_FORMAT_CURL_OFF_T
+                 " to %" CURL_FORMAT_CURL_OFF_T ", totally %"
+                 CURL_FORMAT_CURL_OFF_T " bytes\n",
                  from, to, data->req.maxdownload));
   }
   else
@@ -465,7 +466,7 @@ static CURLcode file_do(struct connectdata *conn, bool *done)
   if(data->set.opt_no_body && data->set.include_header && fstated) {
     CURLcode result;
     snprintf(buf, sizeof(data->state.buffer),
-             "Content-Length: %" FORMAT_OFF_T "\r\n", expected_size);
+             "Content-Length: %" CURL_FORMAT_CURL_OFF_T "\r\n", expected_size);
     result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
     if(result)
       return result;
diff --git a/lib/ftp.c b/lib/ftp.c
index 5d622a8eb..b9faa3a19 100644
--- a/lib/ftp.c
+++ b/lib/ftp.c
@@ -2263,8 +2263,8 @@ static CURLcode ftp_state_retr(struct connectdata *conn,
       if(data->state.resume_from< 0) {
         /* We're supposed to download the last abs(from) bytes */
         if(filesize < -data->state.resume_from) {
-          failf(data, "Offset (%" FORMAT_OFF_T
-                ") was beyond file size (%" FORMAT_OFF_T ")",
+          failf(data, "Offset (%" CURL_FORMAT_CURL_OFF_T
+                ") was beyond file size (%" CURL_FORMAT_CURL_OFF_T ")",
                 data->state.resume_from, filesize);
           return CURLE_BAD_DOWNLOAD_RESUME;
         }
@@ -2275,8 +2275,8 @@ static CURLcode ftp_state_retr(struct connectdata *conn,
       }
       else {
         if(filesize < data->state.resume_from) {
-          failf(data, "Offset (%" FORMAT_OFF_T
-                ") was beyond file size (%" FORMAT_OFF_T ")",
+          failf(data, "Offset (%" CURL_FORMAT_CURL_OFF_T
+                ") was beyond file size (%" CURL_FORMAT_CURL_OFF_T ")",
                 data->state.resume_from, filesize);
           return CURLE_BAD_DOWNLOAD_RESUME;
         }
@@ -2298,13 +2298,13 @@ static CURLcode ftp_state_retr(struct connectdata *conn,
     }
 
     /* Set resume file transfer offset */
-    infof(data, "Instructs server to resume from offset %" FORMAT_OFF_T
-          "\n", data->state.resume_from);
+    infof(data, "Instructs server to resume from offset %"
+          CURL_FORMAT_CURL_OFF_T "\n", data->state.resume_from);
 
-    PPSENDF(&ftpc->pp, "REST %" FORMAT_OFF_T, data->state.resume_from);
+    PPSENDF(&ftpc->pp, "REST %" CURL_FORMAT_CURL_OFF_T,
+            data->state.resume_from);
 
     state(conn, FTP_RETR_REST);
-
   }
   else {
     /* no resume */
@@ -2331,7 +2331,7 @@ static CURLcode ftp_state_size_resp(struct connectdata *conn,
 #ifdef CURL_FTP_HTTPSTYLE_HEAD
     if(-1 != filesize) {
       snprintf(buf, sizeof(data->state.buffer),
-               "Content-Length: %" FORMAT_OFF_T "\r\n", filesize);
+               "Content-Length: %" CURL_FORMAT_CURL_OFF_T "\r\n", filesize);
       result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
       if(result)
         return result;
@@ -2508,10 +2508,12 @@ static CURLcode ftp_state_get_resp(struct connectdata *conn,
     else if((instate != FTP_LIST) && (data->set.prefer_ascii))
       size = -1; /* kludge for servers that understate ASCII mode file size */
 
-    infof(data, "Maxdownload = %" FORMAT_OFF_T "\n", data->req.maxdownload);
+    infof(data, "Maxdownload = %" CURL_FORMAT_CURL_OFF_T "\n",
+          data->req.maxdownload);
 
     if(instate != FTP_LIST)
-      infof(data, "Getting file with size: %" FORMAT_OFF_T "\n", size);
+      infof(data, "Getting file with size: %" CURL_FORMAT_CURL_OFF_T "\n",
+            size);
 
     /* FTP download: */
     conn->proto.ftpc.state_saved = instate;
@@ -3367,8 +3369,8 @@ static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
        (data->set.infilesize != *ftp->bytecountp) &&
        !data->set.crlf &&
        (ftp->transfer == FTPTRANSFER_BODY)) {
-      failf(data, "Uploaded unaligned file size (%" FORMAT_OFF_T
-            " out of %" FORMAT_OFF_T " bytes)",
+      failf(data, "Uploaded unaligned file size (%" CURL_FORMAT_CURL_OFF_T
+            " out of %" CURL_FORMAT_CURL_OFF_T " bytes)",
             *ftp->bytecountp, data->set.infilesize);
       result = CURLE_PARTIAL_FILE;
     }
@@ -3385,8 +3387,8 @@ static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
         *ftp->bytecountp) &&
 #endif /* CURL_DO_LINEEND_CONV */
        (data->req.maxdownload != *ftp->bytecountp)) {
-      failf(data, "Received only partial file: %" FORMAT_OFF_T " bytes",
-            *ftp->bytecountp);
+      failf(data, "Received only partial file: %" CURL_FORMAT_CURL_OFF_T
+            " bytes", *ftp->bytecountp);
       result = CURLE_PARTIAL_FILE;
     }
     else if(!ftpc->dont_check &&
@@ -3551,26 +3553,27 @@ static CURLcode ftp_range(struct connectdata *conn)
     if((-1 == to) && (from>=0)) {
       /* X - */
       data->state.resume_from = from;
-      DEBUGF(infof(conn->data, "FTP RANGE %" FORMAT_OFF_T " to end of file\n",
-                   from));
+      DEBUGF(infof(conn->data, "FTP RANGE %" CURL_FORMAT_CURL_OFF_T
+                   " to end of file\n", from));
     }
     else if(from < 0) {
       /* -Y */
       data->req.maxdownload = -from;
       data->state.resume_from = from;
-      DEBUGF(infof(conn->data, "FTP RANGE the last %" FORMAT_OFF_T " bytes\n",
-                   -from));
+      DEBUGF(infof(conn->data, "FTP RANGE the last %" CURL_FORMAT_CURL_OFF_T
+                   " bytes\n", -from));
     }
     else {
       /* X-Y */
       data->req.maxdownload = (to-from)+1; /* include last byte */
       data->state.resume_from = from;
-      DEBUGF(infof(conn->data, "FTP RANGE from %" FORMAT_OFF_T
-                   " getting %" FORMAT_OFF_T " bytes\n",
+      DEBUGF(infof(conn->data, "FTP RANGE from %" CURL_FORMAT_CURL_OFF_T
+                   " getting %" CURL_FORMAT_CURL_OFF_T " bytes\n",
                    from, data->req.maxdownload));
     }
-    DEBUGF(infof(conn->data, "range-download from %" FORMAT_OFF_T
-                 " to %" FORMAT_OFF_T ", totally %" FORMAT_OFF_T " bytes\n",
+    DEBUGF(infof(conn->data, "range-download from %" CURL_FORMAT_CURL_OFF_T
+                 " to %" CURL_FORMAT_CURL_OFF_T ", totally %"
+                 CURL_FORMAT_CURL_OFF_T " bytes\n",
                  from, to, data->req.maxdownload));
     ftpc->dont_check = TRUE; /* dont check for successful transfer */
   }
diff --git a/lib/http.c b/lib/http.c
index 90d33de45..04692af11 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -414,8 +414,9 @@ static CURLcode http_perhapsrewind(struct connectdata *conn)
         /* this is already marked to get closed */
         return CURLE_OK;
 
-      infof(data, "NTLM send, close instead of sending %" FORMAT_OFF_T
-            " bytes\n", (curl_off_t)(expectsend - bytessent));
+      infof(data, "NTLM send, close instead of sending %"
+            CURL_FORMAT_CURL_OFF_T " bytes\n",
+            (curl_off_t)(expectsend - bytessent));
     }
 
     /* This is not NTLM or many bytes left to send: close
@@ -2018,9 +2019,8 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
             if((actuallyread == 0) || (actuallyread > readthisamountnow)) {
               /* this checks for greater-than only to make sure that the
                  CURL_READFUNC_ABORT return code still aborts */
-              failf(data, "Could only read %" FORMAT_OFF_T
-                    " bytes from the input",
-                    passed);
+              failf(data, "Could only read %" CURL_FORMAT_CURL_OFF_T
+                    " bytes from the input", passed);
               return CURLE_READ_ERROR;
             }
           } while(passed < data->state.resume_from);
@@ -2065,8 +2065,8 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
            remote part so we tell the server (and act accordingly) that we
            upload the whole file (again) */
         conn->allocptr.rangeline =
-          aprintf("Content-Range: bytes 0-%" FORMAT_OFF_T
-                  "/%" FORMAT_OFF_T "\r\n",
+          aprintf("Content-Range: bytes 0-%" CURL_FORMAT_CURL_OFF_T
+                  "/%" CURL_FORMAT_CURL_OFF_T "\r\n",
                   data->set.infilesize - 1, data->set.infilesize);
 
       }
@@ -2075,8 +2075,8 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
         curl_off_t total_expected_size=
           data->state.resume_from + data->set.infilesize;
         conn->allocptr.rangeline =
-          aprintf("Content-Range: bytes %s%" FORMAT_OFF_T
-                  "/%" FORMAT_OFF_T "\r\n",
+          aprintf("Content-Range: bytes %s%" CURL_FORMAT_CURL_OFF_T
+                  "/%" CURL_FORMAT_CURL_OFF_T "\r\n",
                   data->state.range, total_expected_size-1,
                   total_expected_size);
       }
@@ -2084,7 +2084,7 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
         /* Range was selected and then we just pass the incoming range and
            append total size */
         conn->allocptr.rangeline =
-          aprintf("Content-Range: bytes %s/%" FORMAT_OFF_T "\r\n",
+          aprintf("Content-Range: bytes %s/%" CURL_FORMAT_CURL_OFF_T "\r\n",
                   data->state.range, data->set.infilesize);
       }
       if(!conn->allocptr.rangeline)
@@ -2294,8 +2294,8 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
        !Curl_checkheaders(data, "Content-Length:")) {
       /* only add Content-Length if not uploading chunked */
       result = Curl_add_bufferf(req_buffer,
-                                "Content-Length: %" FORMAT_OFF_T "\r\n",
-                                http->postsize);
+                                "Content-Length: %" CURL_FORMAT_CURL_OFF_T
+                                "\r\n", http->postsize);
       if(result)
         return result;
     }
@@ -2366,8 +2366,8 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
        !Curl_checkheaders(data, "Content-Length:")) {
       /* only add Content-Length if not uploading chunked */
       result = Curl_add_bufferf(req_buffer,
-                                "Content-Length: %" FORMAT_OFF_T "\r\n",
-                                postsize );
+                                "Content-Length: %" CURL_FORMAT_CURL_OFF_T
+                                "\r\n", postsize);
       if(result)
         return result;
     }
@@ -2417,8 +2417,8 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
         /* we allow replacing this header if not during auth negotiation,
            although it isn't very wise to actually set your own */
         result = Curl_add_bufferf(req_buffer,
-                                  "Content-Length: %" FORMAT_OFF_T"\r\n",
-                                  postsize);
+                                  "Content-Length: %" CURL_FORMAT_CURL_OFF_T
+                                  "\r\n", postsize);
         if(result)
           return result;
       }
@@ -2582,8 +2582,8 @@ CURLcode Curl_http(struct connectdata *conn, bool *done)
     if(http->writebytecount >= postsize) {
       /* already sent the entire request body, mark the "upload" as
          complete */
-      infof(data, "upload completely sent off: %" FORMAT_OFF_T " out of "
-            "%" FORMAT_OFF_T " bytes\n",
+      infof(data, "upload completely sent off: %" CURL_FORMAT_CURL_OFF_T
+            " out of %" CURL_FORMAT_CURL_OFF_T " bytes\n",
             http->writebytecount, postsize);
       data->req.upload_done = TRUE;
       data->req.keepon &= ~KEEP_SEND; /* we're done writing */
@@ -3233,7 +3233,7 @@ CURLcode Curl_http_readwrite_headers(struct SessionHandle *data,
            happens for example when older Apache servers send large
            files */
         conn->bits.close = TRUE;
-        infof(data, "Negative content-length: %" FORMAT_OFF_T
+        infof(data, "Negative content-length: %" CURL_FORMAT_CURL_OFF_T
               ", closing after transfer\n", contentlength);
       }
     }
diff --git a/lib/http_proxy.c b/lib/http_proxy.c
index bf3457f6a..556abf1a7 100644
--- a/lib/http_proxy.c
+++ b/lib/http_proxy.c
@@ -380,9 +380,9 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn,
                       keepon = 2;
 
                       if(cl) {
-
-                        infof(data, "Ignore %" FORMAT_OFF_T
+                        infof(data, "Ignore %" CURL_FORMAT_CURL_OFF_T
                               " bytes of response-body\n", cl);
+
                         /* remove the remaining chunk of what we already
                            read */
                         cl -= (gotbytes - i);
diff --git a/lib/imap.c b/lib/imap.c
index 3f881ee0e..9040e4426 100644
--- a/lib/imap.c
+++ b/lib/imap.c
@@ -775,7 +775,7 @@ static CURLcode imap_perform_append(struct connectdata *conn)
     return CURLE_OUT_OF_MEMORY;
 
   /* Send the APPEND command */
-  result = imap_sendf(conn, "APPEND %s (\\Seen) {%" FORMAT_OFF_T "}",
+  result = imap_sendf(conn, "APPEND %s (\\Seen) {%" CURL_FORMAT_CURL_OFF_T "}",
                       mailbox, conn->data->set.infilesize);
 
   Curl_safefree(mailbox);
@@ -1494,7 +1494,7 @@ static CURLcode imap_state_fetch_resp(struct connectdata *conn, int imapcode,
   }
 
   if(parsed) {
-    infof(data, "Found %" FORMAT_OFF_TU " bytes to download\n", size);
+    infof(data, "Found %" CURL_FORMAT_CURL_OFF_TU " bytes to download\n", size);
     Curl_pgrsSetDownloadSize(data, size);
 
     if(pp->cache) {
@@ -1513,7 +1513,8 @@ static CURLcode imap_state_fetch_resp(struct connectdata *conn, int imapcode,
 
       data->req.bytecount += chunk;
 
-      infof(data, "Written %" FORMAT_OFF_TU " bytes, %" FORMAT_OFF_TU
+      infof(data, "Written %" CURL_FORMAT_CURL_OFF_TU
+            " bytes, %" CURL_FORMAT_CURL_OFF_TU
             " bytes are left for transfer\n", (curl_off_t)chunk,
             size - chunk);
 
diff --git a/lib/multi.c b/lib/multi.c
index 191c9b88a..3badb10f9 100644
--- a/lib/multi.c
+++ b/lib/multi.c
@@ -986,7 +986,8 @@ static CURLMcode multi_runsingle(struct Curl_multi *multi,
         else {
           k = &data->req;
           failf(data, "Operation timed out after %ld milliseconds with %"
-                FORMAT_OFF_T " out of %" FORMAT_OFF_T " bytes received",
+                CURL_FORMAT_CURL_OFF_T " out of %"
+                CURL_FORMAT_CURL_OFF_T " bytes received",
                 Curl_tvdiff(now, data->progress.t_startsingle), k->bytecount,
                 k->size);
         }
diff --git a/lib/pipeline.c b/lib/pipeline.c
index 418058afa..3866597e1 100644
--- a/lib/pipeline.c
+++ b/lib/pipeline.c
@@ -85,8 +85,8 @@ bool Curl_pipeline_penalized(struct SessionHandle *data,
        (curl_off_t)conn->chunk.datasize > chunk_penalty_size)
       penalized = TRUE;
 
-    infof(data, "Conn: %ld (%p) Receive pipe weight: (%" FORMAT_OFF_T
-          "/%zu), penalized: %s\n",
+    infof(data, "Conn: %ld (%p) Receive pipe weight: (%"
+          CURL_FORMAT_CURL_OFF_T "/%zu), penalized: %s\n",
           conn->connection_id, (void *)conn, recv_size,
           conn->chunk.datasize, penalized?"TRUE":"FALSE");
     return penalized;
diff --git a/lib/progress.c b/lib/progress.c
index dac7f8d6e..a242f8bc2 100644
--- a/lib/progress.c
+++ b/lib/progress.c
@@ -42,8 +42,8 @@ static void time2str(char *r, curl_off_t seconds)
   if(h <= CURL_OFF_T_C(99)) {
     m = (seconds - (h*CURL_OFF_T_C(3600))) / CURL_OFF_T_C(60);
     s = (seconds - (h*CURL_OFF_T_C(3600))) - (m*CURL_OFF_T_C(60));
-    snprintf(r, 9, "%2" FORMAT_OFF_T ":%02" FORMAT_OFF_T ":%02" FORMAT_OFF_T,
-             h, m, s);
+    snprintf(r, 9, "%2" CURL_FORMAT_CURL_OFF_T ":%02" CURL_FORMAT_CURL_OFF_T
+             ":%02" CURL_FORMAT_CURL_OFF_T, h, m, s);
   }
   else {
     /* this equals to more than 99 hours, switch to a more suitable output
@@ -51,9 +51,10 @@ static void time2str(char *r, curl_off_t seconds)
     d = seconds / CURL_OFF_T_C(86400);
     h = (seconds - (d*CURL_OFF_T_C(86400))) / CURL_OFF_T_C(3600);
     if(d <= CURL_OFF_T_C(999))
-      snprintf(r, 9, "%3" FORMAT_OFF_T "d %02" FORMAT_OFF_T "h", d, h);
+      snprintf(r, 9, "%3" CURL_FORMAT_CURL_OFF_T
+               "d %02" CURL_FORMAT_CURL_OFF_T "h", d, h);
     else
-      snprintf(r, 9, "%7" FORMAT_OFF_T "d", d);
+      snprintf(r, 9, "%7" CURL_FORMAT_CURL_OFF_T "d", d);
   }
 }
 
@@ -69,40 +70,40 @@ static char *max5data(curl_off_t bytes, char *max5)
 #define ONE_PETABYTE (CURL_OFF_T_C(1024) * ONE_TERABYTE)
 
   if(bytes < CURL_OFF_T_C(100000))
-    snprintf(max5, 6, "%5" FORMAT_OFF_T, bytes);
+    snprintf(max5, 6, "%5" CURL_FORMAT_CURL_OFF_T, bytes);
 
   else if(bytes < CURL_OFF_T_C(10000) * ONE_KILOBYTE)
-    snprintf(max5, 6, "%4" FORMAT_OFF_T "k", bytes/ONE_KILOBYTE);
+    snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "k", bytes/ONE_KILOBYTE);
 
   else if(bytes < CURL_OFF_T_C(100) * ONE_MEGABYTE)
     /* 'XX.XM' is good as long as we're less than 100 megs */
-    snprintf(max5, 6, "%2" FORMAT_OFF_T ".%0" FORMAT_OFF_T "M",
-              bytes/ONE_MEGABYTE,
+    snprintf(max5, 6, "%2" CURL_FORMAT_CURL_OFF_T ".%0"
+             CURL_FORMAT_CURL_OFF_T "M", bytes/ONE_MEGABYTE,
              (bytes%ONE_MEGABYTE) / (ONE_MEGABYTE/CURL_OFF_T_C(10)) );
 
 #if (CURL_SIZEOF_CURL_OFF_T > 4)
 
   else if(bytes < CURL_OFF_T_C(10000) * ONE_MEGABYTE)
     /* 'XXXXM' is good until we're at 10000MB or above */
-    snprintf(max5, 6, "%4" FORMAT_OFF_T "M", bytes/ONE_MEGABYTE);
+    snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "M", bytes/ONE_MEGABYTE);
 
   else if(bytes < CURL_OFF_T_C(100) * ONE_GIGABYTE)
     /* 10000 MB - 100 GB, we show it as XX.XG */
-    snprintf(max5, 6, "%2" FORMAT_OFF_T ".%0" FORMAT_OFF_T "G",
-              bytes/ONE_GIGABYTE,
+    snprintf(max5, 6, "%2" CURL_FORMAT_CURL_OFF_T ".%0"
+             CURL_FORMAT_CURL_OFF_T "G", bytes/ONE_GIGABYTE,
              (bytes%ONE_GIGABYTE) / (ONE_GIGABYTE/CURL_OFF_T_C(10)) );
 
   else if(bytes < CURL_OFF_T_C(10000) * ONE_GIGABYTE)
     /* up to 10000GB, display without decimal: XXXXG */
-    snprintf(max5, 6, "%4" FORMAT_OFF_T "G", bytes/ONE_GIGABYTE);
+    snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "G", bytes/ONE_GIGABYTE);
 
   else if(bytes < CURL_OFF_T_C(10000) * ONE_TERABYTE)
     /* up to 10000TB, display without decimal: XXXXT */
-    snprintf(max5, 6, "%4" FORMAT_OFF_T "T", bytes/ONE_TERABYTE);
+    snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "T", bytes/ONE_TERABYTE);
 
   else
     /* up to 10000PB, display without decimal: XXXXP */
-    snprintf(max5, 6, "%4" FORMAT_OFF_T "P", bytes/ONE_PETABYTE);
+    snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "P", bytes/ONE_PETABYTE);
 
     /* 16384 petabytes (16 exabytes) is the maximum a 64 bit unsigned number
        can hold, but our data type is signed so 8192PB will be the maximum. */
@@ -110,7 +111,7 @@ static char *max5data(curl_off_t bytes, char *max5)
 #else
 
   else
-    snprintf(max5, 6, "%4" FORMAT_OFF_T "M", bytes/ONE_MEGABYTE);
+    snprintf(max5, 6, "%4" CURL_FORMAT_CURL_OFF_T "M", bytes/ONE_MEGABYTE);
 
 #endif
 
@@ -392,8 +393,8 @@ int Curl_pgrsUpdate(struct connectdata *conn)
     if(!(data->progress.flags & PGRS_HEADERS_OUT)) {
       if(data->state.resume_from) {
         fprintf(data->set.err,
-                "** Resuming transfer from byte position %" FORMAT_OFF_T "\n",
-                data->state.resume_from);
+                "** Resuming transfer from byte position %"
+                CURL_FORMAT_CURL_OFF_T "\n", data->state.resume_from);
       }
       fprintf(data->set.err,
               "  %% Total    %% Received %% Xferd  Average Speed   "
@@ -457,9 +458,9 @@ int Curl_pgrsUpdate(struct connectdata *conn)
 
     fprintf(data->set.err,
             "\r"
-            "%3" FORMAT_OFF_T " %s  "
-            "%3" FORMAT_OFF_T " %s  "
-            "%3" FORMAT_OFF_T " %s  %s  %s %s %s %s %s",
+            "%3" CURL_FORMAT_CURL_OFF_T " %s  "
+            "%3" CURL_FORMAT_CURL_OFF_T " %s  "
+            "%3" CURL_FORMAT_CURL_OFF_T " %s  %s  %s %s %s %s %s",
             total_percen,  /* 3 letters */                /* total % */
             max5data(total_expected_transfer, max5[2]),   /* total size */
             dlpercen,      /* 3 letters */                /* rcvd % */
diff --git a/lib/rtsp.c b/lib/rtsp.c
index f7c6562a7..6bedbf0f9 100644
--- a/lib/rtsp.c
+++ b/lib/rtsp.c
@@ -509,7 +509,7 @@ static CURLcode rtsp_do(struct connectdata *conn, bool *done)
        * actually set a custom Content-Length in the headers */
       if(!Curl_checkheaders(data, "Content-Length:")) {
         result = Curl_add_bufferf(req_buffer,
-            "Content-Length: %" FORMAT_OFF_T"\r\n",
+            "Content-Length: %" CURL_FORMAT_CURL_OFF_T"\r\n",
             (data->set.upload ? putsize : postsize));
         if(result)
           return result;
diff --git a/lib/smtp.c b/lib/smtp.c
index 936320377..616481d8b 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -582,7 +582,7 @@ static CURLcode smtp_perform_mail(struct connectdata *conn)
 
   /* Calculate the optional SIZE parameter */
   if(conn->proto.smtpc.size_supported && conn->data->set.infilesize > 0) {
-    size = aprintf("%" FORMAT_OFF_T, data->set.infilesize);
+    size = aprintf("%" CURL_FORMAT_CURL_OFF_T, data->set.infilesize);
 
     if(!size) {
       Curl_safefree(from);
diff --git a/lib/ssh.c b/lib/ssh.c
index a4b2c673b..9838c9579 100644
--- a/lib/ssh.c
+++ b/lib/ssh.c
@@ -1602,7 +1602,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
           else {
             curl_off_t size = attrs.filesize;
             if(size < 0) {
-              failf(data, "Bad file size (%" FORMAT_OFF_T ")", size);
+              failf(data, "Bad file size (%" CURL_FORMAT_CURL_OFF_T ")", size);
               return CURLE_BAD_DOWNLOAD_RESUME;
             }
             data->state.resume_from = attrs.filesize;
@@ -2070,7 +2070,7 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
         curl_off_t size = attrs.filesize;
 
         if(size < 0) {
-          failf(data, "Bad file size (%" FORMAT_OFF_T ")", size);
+          failf(data, "Bad file size (%" CURL_FORMAT_CURL_OFF_T ")", size);
           return CURLE_BAD_DOWNLOAD_RESUME;
         }
         if(conn->data->state.use_range) {
@@ -2092,8 +2092,8 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
           }
           if(from >= size) {
             failf(data, "Offset (%"
-                  FORMAT_OFF_T ") was beyond file size (%" FORMAT_OFF_T ")",
-                  from, attrs.filesize);
+                  CURL_FORMAT_CURL_OFF_T ") was beyond file size (%"
+                  CURL_FORMAT_CURL_OFF_T ")", from, attrs.filesize);
             return CURLE_BAD_DOWNLOAD_RESUME;
           }
           if(from > to) {
@@ -2117,7 +2117,8 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
           /* We're supposed to download the last abs(from) bytes */
           if((curl_off_t)attrs.filesize < -data->state.resume_from) {
             failf(data, "Offset (%"
-                  FORMAT_OFF_T ") was beyond file size (%" FORMAT_OFF_T ")",
+                  CURL_FORMAT_CURL_OFF_T ") was beyond file size (%"
+                  CURL_FORMAT_CURL_OFF_T ")",
                   data->state.resume_from, attrs.filesize);
             return CURLE_BAD_DOWNLOAD_RESUME;
           }
@@ -2126,8 +2127,8 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
         }
         else {
           if((curl_off_t)attrs.filesize < data->state.resume_from) {
-            failf(data, "Offset (%" FORMAT_OFF_T
-                  ") was beyond file size (%" FORMAT_OFF_T ")",
+            failf(data, "Offset (%" CURL_FORMAT_CURL_OFF_T
+                  ") was beyond file size (%" CURL_FORMAT_CURL_OFF_T ")",
                   data->state.resume_from, attrs.filesize);
             return CURLE_BAD_DOWNLOAD_RESUME;
           }
diff --git a/lib/tftp.c b/lib/tftp.c
index 04e8fa798..5b473d706 100644
--- a/lib/tftp.c
+++ b/lib/tftp.c
@@ -499,7 +499,8 @@ static CURLcode tftp_send_first(tftp_state_data_t *state, tftp_event_t event)
 
     /* add tsize option */
     if(data->set.upload && (data->set.infilesize != -1))
-      snprintf( buf, sizeof(buf), "%" FORMAT_OFF_T, data->set.infilesize );
+      snprintf(buf, sizeof(buf), "%" CURL_FORMAT_CURL_OFF_T,
+               data->set.infilesize);
     else
       strcpy(buf, "0"); /* the destination is large enough */
 
diff --git a/lib/transfer.c b/lib/transfer.c
index 4dbc4e1b7..7861174a7 100644
--- a/lib/transfer.c
+++ b/lib/transfer.c
@@ -646,9 +646,9 @@ static CURLcode readwrite_data(struct SessionHandle *data,
                always will fit in a size_t */
             infof(data,
                   "Rewinding stream by : %zu"
-                  " bytes on url %s (size = %" FORMAT_OFF_T
-                  ", maxdownload = %" FORMAT_OFF_T
-                  ", bytecount = %" FORMAT_OFF_T ", nread = %zd)\n",
+                  " bytes on url %s (size = %" CURL_FORMAT_CURL_OFF_T
+                  ", maxdownload = %" CURL_FORMAT_CURL_OFF_T
+                  ", bytecount = %" CURL_FORMAT_CURL_OFF_T ", nread = %zd)\n",
                   excess, data->state.path,
                   k->size, k->maxdownload, k->bytecount, nread);
             read_rewind(conn, excess);
@@ -657,9 +657,9 @@ static CURLcode readwrite_data(struct SessionHandle *data,
             infof(data,
                   "Excess found in a non pipelined read:"
                   " excess = %zu"
-                  ", size = %" FORMAT_OFF_T
-                  ", maxdownload = %" FORMAT_OFF_T
-                  ", bytecount = %" FORMAT_OFF_T "\n",
+                  ", size = %" CURL_FORMAT_CURL_OFF_T
+                  ", maxdownload = %" CURL_FORMAT_CURL_OFF_T
+                  ", bytecount = %" CURL_FORMAT_CURL_OFF_T "\n",
                   excess, k->size, k->maxdownload, k->bytecount);
           }
         }
@@ -1095,13 +1095,14 @@ CURLcode Curl_readwrite(struct connectdata *conn,
     if(0 > Curl_timeleft(data, &k->now, FALSE)) {
       if(k->size != -1) {
         failf(data, "Operation timed out after %ld milliseconds with %"
-              FORMAT_OFF_T " out of %" FORMAT_OFF_T " bytes received",
+              CURL_FORMAT_CURL_OFF_T " out of %"
+              CURL_FORMAT_CURL_OFF_T " bytes received",
               Curl_tvdiff(k->now, data->progress.t_startsingle), k->bytecount,
               k->size);
       }
       else {
         failf(data, "Operation timed out after %ld milliseconds with %"
-              FORMAT_OFF_T " bytes received",
+              CURL_FORMAT_CURL_OFF_T " bytes received",
               Curl_tvdiff(k->now, data->progress.t_startsingle), k->bytecount);
       }
       return CURLE_OPERATION_TIMEDOUT;
@@ -1123,7 +1124,7 @@ CURLcode Curl_readwrite(struct connectdata *conn,
        (k->bytecount != (k->size + data->state.crlf_conversions)) &&
 #endif /* CURL_DO_LINEEND_CONV */
        !data->req.newurl) {
-      failf(data, "transfer closed with %" FORMAT_OFF_T
+      failf(data, "transfer closed with %" CURL_FORMAT_CURL_OFF_T
             " bytes remaining to read",
             k->size - k->bytecount);
       return CURLE_PARTIAL_FILE;
diff --git a/lib/url.c b/lib/url.c
index 43b7840ad..74d0893f2 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -3991,7 +3991,7 @@ static CURLcode setup_range(struct SessionHandle *data)
       free(s->range);
 
     if(s->resume_from)
-      s->range = aprintf("%" FORMAT_OFF_TU "-", s->resume_from);
+      s->range = aprintf("%" CURL_FORMAT_CURL_OFF_TU "-", s->resume_from);
     else
       s->range = strdup(data->set.str[STRING_SET_RANGE]);
 
diff --git a/tests/libtest/lib557.c b/tests/libtest/lib557.c
index dc3bcae86..7e5f9e94f 100644
--- a/tests/libtest/lib557.c
+++ b/tests/libtest/lib557.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -1354,7 +1354,7 @@ static int test_curl_off_t_formatting(void)
       co_test[i].result[j] = 'X';
     co_test[i].result[BUFSZ-1] = '\0';
 
-    (void)curl_msprintf(co_test[i].result, "%" FORMAT_OFF_T, co_test[i].num);
+    (void)curl_msprintf(co_test[i].result, "%" CURL_FORMAT_CURL_OFF_T, co_test[i].num);
 
     if(memcmp(co_test[i].result,
                co_test[i].expected,