diff --git a/test/testshader.c b/test/testshader.c
index 5543edb9b7..7ca10f1fb2 100644
--- a/test/testshader.c
+++ b/test/testshader.c
@@ -11,6 +11,7 @@
 */
 /* This is a simple example of using GLSL shaders with SDL */
 
+#include <stdlib.h>
 #include "SDL.h"
 
 #ifdef HAVE_OPENGL