diff --git a/ndnboost/functional/hash.hpp b/ndnboost/functional/hash.hpp
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+++ b/ndnboost/functional/hash.hpp
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+
+// Copyright 2005-2009 Daniel James.
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <ndnboost/functional/hash/hash.hpp>
+