diff --git a/ndnboost/mpl/same_as.hpp b/ndnboost/mpl/same_as.hpp
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+++ b/ndnboost/mpl/same_as.hpp
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+
+#ifndef BOOST_MPL_SAME_AS_HPP_INCLUDED
+#define BOOST_MPL_SAME_AS_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: same_as.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/not.hpp>
+#include <ndnboost/mpl/aux_/lambda_spec.hpp>
+#include <ndnboost/mpl/aux_/config/forwarding.hpp>
+
+#include <ndnboost/type_traits/is_same.hpp>
+
+namespace ndnboost { namespace mpl {
+
+template< typename T1 >
+struct same_as
+{
+    template< typename T2 > struct apply
+#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
+        : is_same<T1,T2>
+    {
+#else
+    {
+        typedef typename is_same<T1,T2>::type type;
+#endif
+    };
+};
+
+template< typename T1 >
+struct not_same_as
+{
+    template< typename T2 > struct apply
+#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
+        : not_< is_same<T1,T2> >
+    {
+#else
+    {
+        typedef typename not_< is_same<T1,T2> >::type type;
+#endif
+    };
+};
+
+}}
+
+#endif // BOOST_MPL_SAME_AS_HPP_INCLUDED