$OpenBSD: patch-arc4_c,v 1.2 2021/02/05 10:06:23 sthen Exp $

--- arc4.c.orig	Mon Jul 16 17:28:15 2001
+++ arc4.c	Sat Jun 28 13:04:51 2003
@@ -29,6 +29,7 @@
  */
 
 #include <sys/types.h>
+#include <string.h>
 
 #include "config.h"
 
