diff --git a/test/testoverlay2.c b/test/testoverlay2.c
index 405988fde..5ac1629b6 100644
--- a/test/testoverlay2.c
+++ b/test/testoverlay2.c
@@ -5,6 +5,10 @@
  *                                                                              *
  ********************************************************************************/
 
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
 #include "SDL.h"
 
 #define MOOSEPIC_W 64