diff --git a/GL/platform.h b/GL/platform.h
index b8d4db5..8e29677 100644
--- a/GL/platform.h
+++ b/GL/platform.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <stdint.h>
+#include <stdlib.h>
 #include <stdbool.h>
 #include <assert.h>