diff --git a/boost/mpl/aux_/preprocessor/def_params_tail.hpp b/boost/mpl/aux_/preprocessor/def_params_tail.hpp
new file mode 100644
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+++ b/boost/mpl/aux_/preprocessor/def_params_tail.hpp
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+
+#ifndef BOOST_MPL_AUX_PREPROCESSOR_DEF_PARAMS_TAIL_HPP_INCLUDED
+#define BOOST_MPL_AUX_PREPROCESSOR_DEF_PARAMS_TAIL_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: def_params_tail.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
+// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
+// $Revision: 49267 $
+
+#include <boost/mpl/limits/arity.hpp>
+#include <boost/mpl/aux_/config/dtp.hpp>
+#include <boost/mpl/aux_/config/preprocessor.hpp>
+
+#include <boost/preprocessor/comma_if.hpp>
+#include <boost/preprocessor/logical/and.hpp>
+#include <boost/preprocessor/identity.hpp>
+#include <boost/preprocessor/empty.hpp>
+
+// BOOST_MPL_PP_DEF_PARAMS_TAIL(1,T,value): , T1 = value, .., Tn = value
+// BOOST_MPL_PP_DEF_PARAMS_TAIL(2,T,value): , T2 = value, .., Tn = value
+// BOOST_MPL_PP_DEF_PARAMS_TAIL(n,T,value): <nothing>
+
+#if !defined(BOOST_MPL_CFG_NO_OWN_PP_PRIMITIVES)
+
+#   include <boost/mpl/aux_/preprocessor/filter_params.hpp>
+#   include <boost/mpl/aux_/preprocessor/sub.hpp>
+
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_IMPL(i, param, value_func) \
+    BOOST_MPL_PP_DEF_PARAMS_TAIL_DELAY_1( \
+          i \
+        , BOOST_MPL_PP_SUB(BOOST_MPL_LIMIT_METAFUNCTION_ARITY,i) \
+        , param \
+        , value_func \
+        ) \
+    /**/
+
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_DELAY_1(i, n, param, value_func) \
+    BOOST_MPL_PP_DEF_PARAMS_TAIL_DELAY_2(i,n,param,value_func) \
+    /**/
+
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_DELAY_2(i, n, param, value_func) \
+    BOOST_PP_COMMA_IF(BOOST_PP_AND(i,n)) \
+    BOOST_MPL_PP_DEF_PARAMS_TAIL_##i(n,param,value_func) \
+    /**/
+
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_0(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p##1 v(),p##2 v(),p##3 v(),p##4 v(),p##5 v(),p##6 v(),p##7 v(),p##8 v(),p##9 v())
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_1(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p##2 v(),p##3 v(),p##4 v(),p##5 v(),p##6 v(),p##7 v(),p##8 v(),p##9 v(),p1)
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_2(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p##3 v(),p##4 v(),p##5 v(),p##6 v(),p##7 v(),p##8 v(),p##9 v(),p1,p2)
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_3(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p##4 v(),p##5 v(),p##6 v(),p##7 v(),p##8 v(),p##9 v(),p1,p2,p3)
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_4(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p##5 v(),p##6 v(),p##7 v(),p##8 v(),p##9 v(),p1,p2,p3,p4)
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_5(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p##6 v(),p##7 v(),p##8 v(),p##9 v(),p1,p2,p3,p4,p5)
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_6(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p##7 v(),p##8 v(),p##9 v(),p1,p2,p3,p4,p5,p6)
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_7(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p##8 v(),p##9 v(),p1,p2,p3,p4,p5,p6,p7)
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_8(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p##9 v(),p1,p2,p3,p4,p5,p6,p7,p8)
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_9(i,p,v) BOOST_MPL_PP_FILTER_PARAMS_##i(p1,p2,p3,p4,p5,p6,p7,p8,p9)
+
+#else
+
+#   include <boost/preprocessor/arithmetic/add.hpp>
+#   include <boost/preprocessor/arithmetic/sub.hpp>
+#   include <boost/preprocessor/inc.hpp>
+#   include <boost/preprocessor/tuple/elem.hpp>
+#   include <boost/preprocessor/repeat.hpp>
+#   include <boost/preprocessor/cat.hpp>
+
+#   define BOOST_MPL_PP_AUX_TAIL_PARAM_FUNC(unused, i, op) \
+    , BOOST_PP_CAT( \
+          BOOST_PP_TUPLE_ELEM(3, 1, op) \
+        , BOOST_PP_ADD_D(1, i, BOOST_PP_INC(BOOST_PP_TUPLE_ELEM(3, 0, op))) \
+        ) BOOST_PP_TUPLE_ELEM(3, 2, op)() \
+    /**/
+
+#   define BOOST_MPL_PP_DEF_PARAMS_TAIL_IMPL(i, param, value_func) \
+    BOOST_PP_REPEAT( \
+          BOOST_PP_SUB_D(1, BOOST_MPL_LIMIT_METAFUNCTION_ARITY, i) \
+        , BOOST_MPL_PP_AUX_TAIL_PARAM_FUNC \
+        , (i, param, value_func) \
+        ) \
+    /**/
+
+
+#endif // BOOST_MPL_CFG_NO_OWN_PP_PRIMITIVES
+
+#define BOOST_MPL_PP_DEF_PARAMS_TAIL(i, param, value) \
+    BOOST_MPL_PP_DEF_PARAMS_TAIL_IMPL(i, param, BOOST_PP_IDENTITY(=value)) \
+    /**/
+
+#if !defined(BOOST_MPL_CFG_NO_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES)
+#   define BOOST_MPL_PP_NESTED_DEF_PARAMS_TAIL(i, param, value) \
+    BOOST_MPL_PP_DEF_PARAMS_TAIL_IMPL(i, param, BOOST_PP_IDENTITY(=value)) \
+    /**/
+#else
+#   define BOOST_MPL_PP_NESTED_DEF_PARAMS_TAIL(i, param, value) \
+    BOOST_MPL_PP_DEF_PARAMS_TAIL_IMPL(i, param, BOOST_PP_EMPTY) \
+    /**/
+#endif
+
+#endif // BOOST_MPL_AUX_PREPROCESSOR_DEF_PARAMS_TAIL_HPP_INCLUDED