diff --git a/boost/type_traits/detail/size_t_trait_def.hpp b/boost/type_traits/detail/size_t_trait_def.hpp
new file mode 100644
index 0000000..edae56c
--- /dev/null
+++ b/boost/type_traits/detail/size_t_trait_def.hpp
@@ -0,0 +1,60 @@
+
+// NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION
+
+// Copyright Aleksey Gurtovoy 2002-2004
+//
+// 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)
+
+// $Source$
+// $Date: 2011-04-25 05:26:48 -0700 (Mon, 25 Apr 2011) $
+// $Revision: 71481 $
+
+#include <boost/type_traits/detail/template_arity_spec.hpp>
+#include <boost/type_traits/integral_constant.hpp>
+#include <boost/mpl/aux_/lambda_support.hpp>
+#include <boost/mpl/size_t.hpp>
+
+#include <cstddef>
+
+#if !defined(BOOST_MSVC) || BOOST_MSVC >= 1300
+#   define BOOST_TT_AUX_SIZE_T_BASE(C) public ::ndnboost::integral_constant<std::size_t,C>
+#   define BOOST_TT_AUX_SIZE_T_TRAIT_VALUE_DECL(C) /**/
+#else
+#   define BOOST_TT_AUX_SIZE_T_BASE(C) public ::ndnboost::mpl::size_t<C>
+#   define BOOST_TT_AUX_SIZE_T_TRAIT_VALUE_DECL(C) \
+    typedef ::ndnboost::mpl::size_t<C> base_; \
+    using base_::value; \
+    /**/
+#endif
+
+
+#define BOOST_TT_AUX_SIZE_T_TRAIT_DEF1(trait,T,C) \
+template< typename T > struct trait \
+    : BOOST_TT_AUX_SIZE_T_BASE(C) \
+{ \
+public:\
+    BOOST_TT_AUX_SIZE_T_TRAIT_VALUE_DECL(C) \
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(1,trait,(T)) \
+}; \
+\
+BOOST_TT_AUX_TEMPLATE_ARITY_SPEC(1,trait) \
+/**/
+
+#define BOOST_TT_AUX_SIZE_T_TRAIT_SPEC1(trait,spec,C) \
+template<> struct trait<spec> \
+    : BOOST_TT_AUX_SIZE_T_BASE(C) \
+{ \
+public:\
+    BOOST_TT_AUX_SIZE_T_TRAIT_VALUE_DECL(C) \
+    BOOST_MPL_AUX_LAMBDA_SUPPORT_SPEC(1,trait,(spec)) \
+}; \
+/**/
+
+#define BOOST_TT_AUX_SIZE_T_TRAIT_PARTIAL_SPEC1_1(param,trait,spec,C) \
+template< param > struct trait<spec> \
+    : BOOST_TT_AUX_SIZE_T_BASE(C) \
+{ \
+}; \
+/**/