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$NetBSD: patch-ac,v 1.7 2008/04/03 09:07:49 joerg Exp $

--- src/lexpgn.l.orig	2008-04-03 11:01:56.000000000 +0200
+++ src/lexpgn.l
@@ -37,6 +37,7 @@
 #include <stdlib.h>
 #include <ctype.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "common.h"
 #include "lexpgn.h"