--- geekcode.h.orig	2003-06-30 16:47:40.000000000 +0200
+++ geekcode.h	2010-12-30 19:14:51.000000000 +0100
@@ -22,6 +22,7 @@
 #ifndef __INCLUDED_GEEKCODE_H__
 #define __INCLUDED_GEEKCODE_H__
 
+#include <stdlib.h> /* exit() */
 
 #define VERSION "1.7.3" /* Added in v1.2 */