$OpenBSD: patch-src_richmail_richlex_c,v 1.1 2012/03/17 10:57:23 sthen Exp $
--- src/richmail/richlex.c.orig	Thu Feb  3 02:29:37 1994
+++ src/richmail/richlex.c	Sat Mar 17 10:51:52 2012
@@ -43,6 +43,7 @@
 
 #include <stdio.h>
 #include <ctype.h>
+#include <string.h>
 #include "richlex.h"
 #include "richset.h"