diff --git a/ndnboost/mpl/long_fwd.hpp b/ndnboost/mpl/long_fwd.hpp
new file mode 100644
index 0000000..5247bc3
--- /dev/null
+++ b/ndnboost/mpl/long_fwd.hpp
@@ -0,0 +1,27 @@
+
+#ifndef BOOST_MPL_LONG_FWD_HPP_INCLUDED
+#define BOOST_MPL_LONG_FWD_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2000-2004
+//
+// 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: long_fwd.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
+// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
+// $Revision: 49267 $
+
+#include <ndnboost/mpl/aux_/adl_barrier.hpp>
+#include <ndnboost/mpl/aux_/nttp_decl.hpp>
+
+BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
+
+template< BOOST_MPL_AUX_NTTP_DECL(long, N) > struct long_;
+
+BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
+BOOST_MPL_AUX_ADL_BARRIER_DECL(long_)
+
+#endif // BOOST_MPL_LONG_FWD_HPP_INCLUDED