--- /dev/null
+/*=============================================================================
+ Copyright (c) 2001-2011 Joel de Guzman
+
+ 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)
+==============================================================================*/
+#if !defined(BOOST_FUSION_SUPPORT_VOID_20070706_2125)
+#define BOOST_FUSION_SUPPORT_VOID_20070706_2125
+
+namespace boost { namespace fusion
+{
+ struct void_ {};
+}}
+
+#endif