diff --git a/ref/gl/gl2_shim/gl2_shim.c b/ref/gl/gl2_shim/gl2_shim.c
index 63b2c9e1..fe75eee5 100644
--- a/ref/gl/gl2_shim/gl2_shim.c
+++ b/ref/gl/gl2_shim/gl2_shim.c
@@ -34,7 +34,7 @@ Limitations:
 #include "gl_local.h"
 #ifndef XASH_GL_STATIC
 #include "gl2_shim.h"
-#include <malloc.h>
+#include ALLOCA_H
 
 #define MAX_SHADERLEN 4096
 // increase this when adding more attributes