diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index b7c030c006..4629f79fb9 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -90,7 +90,7 @@
 /* Disable Visual Studio warnings: 4127 "conditional expression is constant" */
 #pragma warning(disable:4127)
 #ifndef _CRT_SECURE_NO_WARNINGS
-#define _CRT_SECURE_NO_WARNINGS  /* for getenv(), tests: sscanf() */
+#define _CRT_SECURE_NO_WARNINGS  /* for _snprintf(), getenv(), sscanf() */
 #endif
 #endif /* _MSC_VER */
 
diff --git a/lib/mprintf.c b/lib/mprintf.c
index 10cede837c..b00f16e34b 100644
--- a/lib/mprintf.c
+++ b/lib/mprintf.c
@@ -688,6 +688,9 @@ static bool out_double(void *userp,
      buffer if it reaches the max size so we do that here. */
   work[BUFFSIZE - 1] = 0;
 #endif
+#elif defined(_MSC_VER) && (_MSC_VER < 1900)
+  _snprintf(work, BUFFSIZE, formatbuf, dnum);
+  work[BUFFSIZE - 1] = 0;
 #else
   /* float and double outputs do not work without snprintf support */
   work[0] = 0;