diff --git a/boost/mpl/bool.hpp b/boost/mpl/bool.hpp
new file mode 100644
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--- /dev/null
+++ b/boost/mpl/bool.hpp
@@ -0,0 +1,39 @@
+
+#ifndef BOOST_MPL_BOOL_HPP_INCLUDED
+#define BOOST_MPL_BOOL_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: bool.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/bool_fwd.hpp>
+#include <boost/mpl/integral_c_tag.hpp>
+#include <boost/mpl/aux_/config/static_constant.hpp>
+
+BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
+
+template< bool C_ > struct bool_
+{
+    BOOST_STATIC_CONSTANT(bool, value = C_);
+    typedef integral_c_tag tag;
+    typedef bool_ type;
+    typedef bool value_type;
+    operator bool() const { return this->value; }
+};
+
+#if !defined(BOOST_NO_INCLASS_MEMBER_INITIALIZATION)
+template< bool C_ >
+bool const bool_<C_>::value;
+#endif
+
+BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
+
+#endif // BOOST_MPL_BOOL_HPP_INCLUDED