--- ./shape.c.orig	1995-12-19 23:21:51.000000000 +0100
+++ ./shape.c	2014-03-29 18:28:41.999944284 +0100
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "constant.h"