$OpenBSD: patch-src_richmail_richset_c,v 1.1 2012/03/17 10:57:23 sthen Exp $
--- src/richmail/richset.c.orig	Wed Oct 21 19:04:19 1992
+++ src/richmail/richset.c	Sat Mar 17 10:51:52 2012
@@ -34,6 +34,7 @@
 -------------------------------------------------------------------------*/
 
 #include <stdio.h>
+#include <stdlib.h>
 #include "richlex.h"
 #include "richset.h"