--- sys/regex.c.orig	Fri Jun 30 06:56:01 1995
+++ sys/regex.c	Wed Mar 28 03:58:57 2001
@@ -35,7 +35,7 @@ re_exec(pattern)
 #else
 #if defined(hpux) \
  || defined(bsdi) \
- || defined(__FreeBSD__)
+ || defined(__FreeBSD__) || defined(__OpenBSD__)
 
 #ifdef bsdi
 #include <stdio.h>
