diff --git a/lib/http.c b/lib/http.c
index 93a5e3e33..ddec280f4 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -977,12 +977,15 @@ Curl_send_buffer *Curl_add_buffer_init(void)
  * Returns CURLcode
  */
 CURLcode Curl_add_buffer_send(Curl_send_buffer *in,
-                         struct connectdata *conn,
-                         long *bytes_written, /* add the number of sent bytes
-                                                 to this counter */
-                         size_t included_body_bytes, /* how much of the buffer
-                                                        contains body data */
-                         int socketindex)
+                              struct connectdata *conn,
+
+                               /* add the number of sent bytes to this
+                                  counter */
+                              long *bytes_written,
+
+                               /* how much of the buffer contains body data */
+                              size_t included_body_bytes,
+                              int socketindex)
 
 {
   ssize_t amount;
@@ -1069,7 +1072,10 @@ CURLcode Curl_add_buffer_send(Curl_send_buffer *in,
          accordingly */
       http->writebytecount += bodylen;
 
-    *bytes_written += amount;
+    /* 'amount' can never be a very large value here so typecasting it so a
+       signed 31 bit value should not cause problems even if ssize_t is
+       64bit */
+    *bytes_written += (long)amount;
 
     if(http) {
       if((size_t)amount != size) {
@@ -1380,7 +1386,7 @@ CURLcode Curl_proxyCONNECT(struct connectdata *conn,
         if(CURLE_OK == result) {
           /* Now send off the request */
           result = Curl_add_buffer_send(req_buffer, conn,
-                                   &data->info.request_size, 0, sockindex);
+                                        &data->info.request_size, 0, sockindex);
         }
         req_buffer = NULL;
         if(result)
diff --git a/lib/http.h b/lib/http.h
index b7c1abf66..3007c319f 100644
--- a/lib/http.h
+++ b/lib/http.h
@@ -56,11 +56,10 @@ Curl_send_buffer *Curl_add_buffer_init(void);
 CURLcode Curl_add_bufferf(Curl_send_buffer *in, const char *fmt, ...);
 CURLcode Curl_add_buffer(Curl_send_buffer *in, const void *inptr, size_t size);
 CURLcode Curl_add_buffer_send(Curl_send_buffer *in,
-                         struct connectdata *conn,
-                         long *bytes_written,
-                         size_t included_body_bytes,
-                         int socketindex);
-
+                              struct connectdata *conn,
+                              long *bytes_written,
+                              size_t included_body_bytes,
+                              int socketindex);
 
 CURLcode Curl_add_timecondition(struct SessionHandle *data,
                                 Curl_send_buffer *buf);