$OpenBSD: patch-src_fileio_cpp,v 1.2 2011/04/02 15:39:36 rpointel Exp $
--- src/fileio.cpp.orig	Thu Nov 18 17:26:29 2010
+++ src/fileio.cpp	Mon Feb 28 21:50:53 2011
@@ -28,6 +28,7 @@
 #endif
 #include <sys/stat.h>
 #include <algorithm>
+#include <unistd.h>
 
 /*************************************************/
 /* FILE IO ROUTINES ******************************/
