diff --git a/ndnboost/mpl/contains_fwd.hpp b/ndnboost/mpl/contains_fwd.hpp
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+++ b/ndnboost/mpl/contains_fwd.hpp
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+
+#ifndef BOOST_MPL_CONTAINS_FWD_HPP_INCLUDED
+#define BOOST_MPL_CONTAINS_FWD_HPP_INCLUDED
+
+// Copyright Eric Friedman 2002
+// Copyright Aleksey Gurtovoy 2004
+//
+// 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)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Id: contains_fwd.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
+// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
+// $Revision: 49267 $
+
+namespace ndnboost { namespace mpl {
+
+template< typename Tag > struct contains_impl;
+template< typename Sequence, typename T > struct contains;
+
+}}
+
+#endif // BOOST_MPL_CONTAINS_FWD_HPP_INCLUDED