$OpenBSD: patch-src_lexpgn_l,v 1.1 2010/05/13 16:37:32 espie Exp $
--- src/lexpgn.l.orig	Thu May 13 18:22:31 2010
+++ src/lexpgn.l	Thu May 13 18:31:28 2010
@@ -37,6 +37,7 @@
 #include <stdlib.h>
 #include <ctype.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "common.h"
 #include "lexpgn.h"