$NetBSD$

--- builtins/psize.c.orig	2005-07-05 17:39:02.000000000 +0200
+++ builtins/psize.c
@@ -40,7 +40,9 @@
 #include "../command.h"
 #include "../general.h"
 #include "../sig.h"
+#ifndef errno
 extern int errno;
+#endif
 
 int nw;