diff --git a/lib/connect.c b/lib/connect.c
index e398f61fb6..92538fc77d 100644
--- a/lib/connect.c
+++ b/lib/connect.c
@@ -77,6 +77,9 @@
 #include <errno.h>
 #include <string.h>
 
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
 #include "urldata.h"
 #include "sendf.h"
 #include "if2ip.h"