diff --git a/src/i830_bios.c b/src/i830_bios.c
index 0a28fb4a..57ee2782 100644
--- a/src/i830_bios.c
+++ b/src/i830_bios.c
@@ -31,6 +31,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
 
 #define _PARSE_EDID_
 #include "xf86.h"