diff --git a/sc2/src/libs/graphics/cmap.c b/sc2/src/libs/graphics/cmap.c
index 1d04789e4..3ebfedb74 100644
--- a/sc2/src/libs/graphics/cmap.c
+++ b/sc2/src/libs/graphics/cmap.c
@@ -22,6 +22,7 @@
 #include "libs/inplib.h"
 #include "libs/log.h"
 #include <string.h>
+#include <stdlib.h>
 
 
 typedef struct xform_control