diff --git a/boost/mpl/aux_/lambda_arity_param.hpp b/boost/mpl/aux_/lambda_arity_param.hpp
new file mode 100644
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--- /dev/null
+++ b/boost/mpl/aux_/lambda_arity_param.hpp
@@ -0,0 +1,25 @@
+
+#ifndef BOOST_MPL_AUX_LAMBDA_ARITY_PARAM_HPP_INCLUDED
+#define BOOST_MPL_AUX_LAMBDA_ARITY_PARAM_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2001-2004
+//
+// 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: lambda_arity_param.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/aux_/config/ttp.hpp>
+
+#if !defined(BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING)
+#   define BOOST_MPL_AUX_LAMBDA_ARITY_PARAM(param)    
+#else
+#   define BOOST_MPL_AUX_LAMBDA_ARITY_PARAM(param) , param
+#endif
+
+#endif // BOOST_MPL_AUX_LAMBDA_ARITY_PARAM_HPP_INCLUDED