diff --git a/src/OpenGL/compiler/PoolAlloc.cpp b/src/OpenGL/compiler/PoolAlloc.cpp
index 1235023..94f9cc9 100644
--- a/src/OpenGL/compiler/PoolAlloc.cpp
+++ b/src/OpenGL/compiler/PoolAlloc.cpp
@@ -18,6 +18,7 @@
 #include <stdint.h>
 #endif
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "InitializeGlobals.h"
 #include "osinclude.h"