diff --git a/include/boost/mpl/aux_/algorithm_namespace.hpp b/include/boost/mpl/aux_/algorithm_namespace.hpp
new file mode 100644
index 0000000..420e1d6
--- /dev/null
+++ b/include/boost/mpl/aux_/algorithm_namespace.hpp
@@ -0,0 +1,34 @@
+//-----------------------------------------------------------------------------
+// boost mpl/aux_/algorithm_namespace.hpp header file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2002
+// Aleksey Gurtovoy
+//
+// Permission to use, copy, modify, distribute and sell this software
+// and its documentation for any purpose is hereby granted without fee, 
+// provided that the above copyright notice appears in all copies and 
+// that both the copyright notice and this permission notice appear in 
+// supporting documentation. No representations are made about the 
+// suitability of this software for any purpose. It is provided "as is" 
+// without express or implied warranty.
+
+#ifndef BOOST_MPL_AUX_ALGORITHM_NAMESPACE_HPP_INCLUDED
+#define BOOST_MPL_AUX_ALGORITHM_NAMESPACE_HPP_INCLUDED
+
+#if defined(__GNUC__) && __GNUC__ >= 3
+
+#   define BOOST_MPL_AUX_AGLORITHM_NAMESPACE_PREFIX algo_::
+#   define BOOST_MPL_AUX_AGLORITHM_NAMESPACE_BEGIN namespace algo_ {
+#   define BOOST_MPL_AUX_AGLORITHM_NAMESPACE_END } using namespace algo_;
+
+#else
+
+#   define BOOST_MPL_AUX_AGLORITHM_NAMESPACE_PREFIX /**/
+#   define BOOST_MPL_AUX_AGLORITHM_NAMESPACE_BEGIN /**/
+#   define BOOST_MPL_AUX_AGLORITHM_NAMESPACE_END /**/
+
+#endif
+
+#endif // BOOST_MPL_AUX_ALGORITHM_NAMESPACE_HPP_INCLUDED
diff --git a/include/boost/mpl/aux_/void_spec.hpp b/include/boost/mpl/aux_/void_spec.hpp
index 2adff70..f9cbb2d 100644
--- a/include/boost/mpl/aux_/void_spec.hpp
+++ b/include/boost/mpl/aux_/void_spec.hpp
@@ -25,6 +25,7 @@
 #include "boost/mpl/aux_/arity.hpp"
 #include "boost/mpl/aux_/template_arity_fwd.hpp"
 #include "boost/mpl/aux_/lambda_arity_param.hpp"
+#include "boost/mpl/aux_/algorithm_namespace.hpp"
 #include "boost/mpl/aux_/config/dtp.hpp"
 #include "boost/mpl/aux_/config/nttp.hpp"
 #include "boost/mpl/aux_/config/ttp.hpp"
@@ -142,4 +143,13 @@ BOOST_MPL_AUX_VOID_SPEC_ARITY(i, name) \
 BOOST_MPL_AUX_VOID_SPEC_TEMPLATE_ARITY(i, j, name) \
 /**/
 
+#define BOOST_MPL_AUX_ALGORITHM_VOID_SPEC(i, name) \
+BOOST_MPL_AUX_AGLORITHM_NAMESPACE_BEGIN \
+BOOST_MPL_AUX_VOID_SPEC_MAIN(i, name) \
+BOOST_MPL_AUX_AGLORITHM_NAMESPACE_END \
+BOOST_MPL_AUX_VOID_SPEC_LAMBDA(i, BOOST_MPL_AUX_AGLORITHM_NAMESPACE_PREFIX name) \
+BOOST_MPL_AUX_VOID_SPEC_ARITY(i, BOOST_MPL_AUX_AGLORITHM_NAMESPACE_PREFIX name) \
+BOOST_MPL_AUX_VOID_SPEC_TEMPLATE_ARITY(i, i, BOOST_MPL_AUX_AGLORITHM_NAMESPACE_PREFIX name) \
+/**/
+
 #endif // BOOST_MPL_AUX_VOID_SPEC_HPP_INCLUDED
diff --git a/include/boost/mpl/copy_backward.hpp b/include/boost/mpl/copy_backward.hpp
index c11be0e..19e5301 100644
--- a/include/boost/mpl/copy_backward.hpp
+++ b/include/boost/mpl/copy_backward.hpp
@@ -19,10 +19,13 @@
 
 #include "boost/mpl/fold_backward.hpp"
 #include "boost/mpl/aux_/void_spec.hpp"
+#include "boost/mpl/aux_/algorithm_namespace.hpp"
 
 namespace boost {
 namespace mpl {
 
+BOOST_MPL_AUX_AGLORITHM_NAMESPACE_BEGIN
+
 template<
       typename BOOST_MPL_AUX_VOID_SPEC_PARAM(Sequence)
     , typename BOOST_MPL_AUX_VOID_SPEC_PARAM(State)
@@ -33,7 +36,8 @@ struct copy_backward
 {
 };
 
-BOOST_MPL_AUX_VOID_SPEC(3, copy_backward)
+BOOST_MPL_AUX_AGLORITHM_NAMESPACE_END
+BOOST_MPL_AUX_ALGORITHM_VOID_SPEC(3, copy_backward)
 
 } // namespace mpl
 } // namespace boost