$OpenBSD: patch-os_h,v 1.1 2001/03/24 22:31:19 brad Exp $
--- os.h.orig	Wed Jul  1 04:29:10 1998
+++ os.h	Sat Mar 24 17:30:42 2001
@@ -18,6 +18,7 @@
 #endif
 
 #if defined(UNIX)
+  #include <sys/types.h>
   #define DIRSEP '/'
 #endif