--- io.c.orig	Tue Mar 14 11:45:05 2000
+++ io.c	Sun Jun 24 00:08:35 2007
@@ -21,6 +21,7 @@
 
 #include <unistd.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include "protos.h"