$OpenBSD: patch-libs_libFreeMat_WalkTree_cpp,v 1.1.1.1 2006/10/28 19:53:05 steven Exp $
--- libs/libFreeMat/WalkTree.cpp.orig	Wed Oct 18 09:49:23 2006
+++ libs/libFreeMat/WalkTree.cpp	Wed Oct 18 09:49:36 2006
@@ -21,6 +21,7 @@
 #include <stack>
 #include <math.h>
 #include <stdio.h>
+#include <unistd.h>
 #include "Exception.hpp"
 #include "Math.hpp"
 #include "Reserved.hpp"
