--- sys/regex.c.orig	Wed Jul 29 02:05:30 1998
+++ sys/regex.c	Wed Jul 29 02:04:46 1998
@@ -35,7 +35,7 @@
 #else
 #if defined(hpux) \
  || defined(bsdi) \
- || defined(__FreeBSD__)
+ || defined(__FreeBSD__) || defined(__OpenBSD__)
 
 #ifdef bsdi
 #include <stdio.h>
