diff --git a/src/renwindow.c b/src/renwindow.c
index 3f83f294..9356ed21 100644
--- a/src/renwindow.c
+++ b/src/renwindow.c
@@ -1,4 +1,5 @@
 #include <assert.h>
+#include <stdio.h>
 #include "renwindow.h"
 
 #ifdef LITE_USE_SDL_RENDERER