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diff --git a/boost/fusion/sequence/io/out.hpp b/boost/fusion/sequence/io/out.hpp
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+++ b/boost/fusion/sequence/io/out.hpp
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+/*=============================================================================
+    Copyright (c) 1999-2003 Jaakko Jarvi
+    Copyright (c) 1999-2003 Jeremiah Willcock
+    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_OUT_05042005_0120)
+#define BOOST_OUT_05042005_0120
+
+#include <ostream>
+#include <boost/fusion/sequence/io/detail/out.hpp>
+#include <boost/fusion/support/is_sequence.hpp>
+#include <boost/utility/enable_if.hpp>
+#include <boost/mpl/or.hpp>
+
+namespace boost { namespace fusion
+{
+    template <typename Sequence>
+    inline std::ostream&
+    out(std::ostream& os, Sequence& seq)
+    {
+        detail::print_sequence(os, seq);
+        return os;
+    }
+    
+    namespace operators
+    {
+        template <typename Sequence>
+        inline typename
+            boost::enable_if<
+               fusion::traits::is_sequence<Sequence>
+              , std::ostream&
+            >::type
+        operator<<(std::ostream& os, Sequence const& seq)
+        {
+            return fusion::out(os, seq);
+        }
+    }
+    using operators::operator<<;
+}}
+
+#endif