diff --git a/include/curl/mprintf.h b/include/curl/mprintf.h
index 7e89fe7d4..6bf24791c 100644
--- a/include/curl/mprintf.h
+++ b/include/curl/mprintf.h
@@ -55,28 +55,28 @@
 
 #include <stdarg.h>
 
-int Curl_mprintf(const char *format, ...);
-int Curl_mfprintf(FILE *fd, const char *format, ...);
-int Curl_msprintf(char *buffer, const char *format, ...);
-int Curl_msnprintf(char *buffer, size_t maxlength, const char *format, ...);
-int Curl_mvprintf(const char *format, va_list args);
-int Curl_mvfprintf(FILE *fd, const char *format, va_list args);
-int Curl_mvsprintf(char *buffer, const char *format, va_list args);
-int Curl_mvsnprintf(char *buffer, size_t maxlength, const char *format, va_list args);
-char *Curl_maprintf(const char *format, ...);
-char *Curl_mvaprintf(const char *format, va_list args);
+int curl_mprintf(const char *format, ...);
+int curl_mfprintf(FILE *fd, const char *format, ...);
+int curl_msprintf(char *buffer, const char *format, ...);
+int curl_msnprintf(char *buffer, size_t maxlength, const char *format, ...);
+int curl_mvprintf(const char *format, va_list args);
+int curl_mvfprintf(FILE *fd, const char *format, va_list args);
+int curl_mvsprintf(char *buffer, const char *format, va_list args);
+int curl_mvsnprintf(char *buffer, size_t maxlength, const char *format, va_list args);
+char *curl_maprintf(const char *format, ...);
+char *curl_mvaprintf(const char *format, va_list args);
 
 #ifdef _MPRINTF_REPLACE
-# define printf Curl_mprintf
-# define fprintf Curl_mfprintf
-# define sprintf Curl_msprintf
-# define snprintf Curl_msnprintf
-# define vprintf Curl_mvprintf
-# define vfprintf Curl_mvfprintf
-# define vsprintf Curl_mvsprintf
-# define vsnprintf Curl_mvsnprintf
-# define aprintf Curl_maprintf
-# define vaprintf Curl_mvaprintf
+# define printf curl_mprintf
+# define fprintf curl_mfprintf
+# define sprintf curl_msprintf
+# define snprintf curl_msnprintf
+# define vprintf curl_mvprintf
+# define vfprintf curl_mvfprintf
+# define vsprintf curl_mvsprintf
+# define vsnprintf curl_mvsnprintf
+# define aprintf curl_maprintf
+# define vaprintf curl_mvaprintf
 #endif
 
 #endif /* H_MPRINTF */
diff --git a/lib/http.c b/lib/http.c
index 555845abb..aa96ed0af 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -161,7 +161,7 @@ CURLcode add_bufferf(send_buffer *in, char *fmt, ...)
   char *s;
   va_list ap;
   va_start(ap, fmt);
-  s = Curl_mvaprintf(fmt, ap); /* this allocs a new string to append */
+  s = vaprintf(fmt, ap); /* this allocs a new string to append */
   va_end(ap);
 
   if(s) {
diff --git a/lib/mprintf.c b/lib/mprintf.c
index dd6dbabad..1bf9a6e72 100644
--- a/lib/mprintf.c
+++ b/lib/mprintf.c
@@ -207,7 +207,7 @@ struct asprintf {
   size_t alloc; /* length of alloc */
 };
 
-int Curl_msprintf(char *buffer, const char *format, ...);
+int curl_msprintf(char *buffer, const char *format, ...);
 
 static int dprintf_DollarString(char *input, char **end)
 {
@@ -955,11 +955,11 @@ static int dprintf_formatf(
 
 	if(width >= 0) {
 	  /* RECURSIVE USAGE */
-	  fptr += Curl_msprintf(fptr, "%d", width);
+	  fptr += curl_msprintf(fptr, "%d", width);
 	}
 	if(prec >= 0) {
 	  /* RECURSIVE USAGE */
-	  fptr += Curl_msprintf(fptr, ".%d", prec);
+	  fptr += curl_msprintf(fptr, ".%d", prec);
 	}
 	if (p->flags & FLAGS_LONG)
 	  strcat(fptr, "l");
@@ -1025,7 +1025,7 @@ static int addbyter(int output, FILE *data)
   return -1;
 }
 
-int Curl_msnprintf(char *buffer, size_t maxlength, const char *format, ...)
+int curl_msnprintf(char *buffer, size_t maxlength, const char *format, ...)
 {
   va_list ap_save; /* argument pointer */
   int retcode;
@@ -1045,7 +1045,7 @@ int Curl_msnprintf(char *buffer, size_t maxlength, const char *format, ...)
   return retcode;
 }
 
-int Curl_mvsnprintf(char *buffer, size_t maxlength, const char *format, va_list ap_save)
+int curl_mvsnprintf(char *buffer, size_t maxlength, const char *format, va_list ap_save)
 {
   int retcode;
   struct nsprintf info;
@@ -1092,7 +1092,7 @@ static int alloc_addbyter(int output, FILE *data)
 
 }
 
-char *Curl_maprintf(const char *format, ...)
+char *curl_maprintf(const char *format, ...)
 {
   va_list ap_save; /* argument pointer */
   int retcode;
@@ -1113,7 +1113,7 @@ char *Curl_maprintf(const char *format, ...)
     return NULL;
 }
 
-char *Curl_mvaprintf(const char *format, va_list ap_save)
+char *curl_mvaprintf(const char *format, va_list ap_save)
 {
   int retcode;
   struct asprintf info;
@@ -1140,7 +1140,7 @@ static int storebuffer(int output, FILE *data)
   return output; /* act like fputc() ! */
 }
 
-int Curl_msprintf(char *buffer, const char *format, ...)
+int curl_msprintf(char *buffer, const char *format, ...)
 {
   va_list ap_save; /* argument pointer */
   int retcode;
@@ -1153,7 +1153,7 @@ int Curl_msprintf(char *buffer, const char *format, ...)
 
 extern int fputc(int, FILE *);
 
-int Curl_mprintf(const char *format, ...)
+int curl_mprintf(const char *format, ...)
 {
   int retcode;
   va_list ap_save; /* argument pointer */
@@ -1163,7 +1163,7 @@ int Curl_mprintf(const char *format, ...)
   return retcode;
 }
 
-int Curl_mfprintf(FILE *whereto, const char *format, ...)
+int curl_mfprintf(FILE *whereto, const char *format, ...)
 {
   int retcode;
   va_list ap_save; /* argument pointer */
@@ -1173,7 +1173,7 @@ int Curl_mfprintf(FILE *whereto, const char *format, ...)
   return retcode;
 }
 
-int Curl_mvsprintf(char *buffer, const char *format, va_list ap_save)
+int curl_mvsprintf(char *buffer, const char *format, va_list ap_save)
 {
   int retcode;
   retcode = dprintf_formatf(&buffer, storebuffer, format, ap_save);
@@ -1181,12 +1181,12 @@ int Curl_mvsprintf(char *buffer, const char *format, va_list ap_save)
   return retcode;
 }
 
-int Curl_mvprintf(const char *format, va_list ap_save)
+int curl_mvprintf(const char *format, va_list ap_save)
 {
   return dprintf_formatf(stdout, fputc, format, ap_save);
 }
 
-int Curl_mvfprintf(FILE *whereto, const char *format, va_list ap_save)
+int curl_mvfprintf(FILE *whereto, const char *format, va_list ap_save)
 {
   return dprintf_formatf(whereto, fputc, format, ap_save);
 }