--- a/src/X/rotated.c	2009-12-04 18:09:55.000000000 +0000
+++ b/src/X/rotated.c	2009-12-04 18:10:37.000000000 +0000
@@ -29,6 +29,7 @@
 #include <stdio.h>
 #include <math.h>
 #include <string.h>
+#include <stdlib.h>
 #include "rotated.h"