diff --git a/lib/libwebsockets.h b/lib/libwebsockets.h
index 8be0054a..ed716e89 100644
--- a/lib/libwebsockets.h
+++ b/lib/libwebsockets.h
@@ -93,6 +93,10 @@ struct sockaddr_in;
 #define __func__ __FUNCTION__
 #endif
 
+#if !defined(__MINGW32__) &&(!defined(_MSC_VER) || _MSC_VER < 1900) && !defined(snprintf)
+#define snprintf(buf,len, format,...) _snprintf_s(buf, len,len, format, __VA_ARGS__)
+#endif
+
 #else /* NOT WIN32 */
 #include <unistd.h>