$NetBSD: patch-aa,v 1.3 2001/11/22 08:12:25 itojun Exp $

--- pen.c-	Thu Nov 22 17:07:15 2001
+++ pen.c	Thu Nov 22 17:07:26 2001
@@ -17,6 +17,7 @@
    MA 02111-1307, USA.
 */
 
+#include <sys/types.h>
 #include <stdio.h>
 #include <ctype.h>
 #include <errno.h>