$NetBSD: patch-ac,v 1.3 2009/06/04 21:49:18 minskim Exp $

--- compat/vis.h.orig	2009-03-31 21:21:28.000000000 +0000
+++ compat/vis.h
@@ -71,7 +71,9 @@
  */
 #define	UNVIS_END	1	/* no more characters */
 
+#ifndef NO_CDEFS_H
 #include <sys/cdefs.h>
+#endif
 
 char	*vis(char *, int, int, int);
 int	strvis(char *, const char *, int);