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diff --git a/boost/fusion/sequence/io/detail/in.hpp b/boost/fusion/sequence/io/detail/in.hpp
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+++ b/boost/fusion/sequence/io/detail/in.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(FUSION_IN_05052005_0121)
+#define FUSION_IN_05052005_0121
+
+#include <istream>
+#include <boost/fusion/sequence/io/detail/manip.hpp>
+
+#include <boost/mpl/bool.hpp>
+#include <boost/fusion/sequence/intrinsic/begin.hpp>
+#include <boost/fusion/sequence/intrinsic/end.hpp>
+#include <boost/fusion/iterator/deref.hpp>
+#include <boost/fusion/iterator/next.hpp>
+#include <boost/fusion/iterator/equal_to.hpp>
+
+namespace boost { namespace fusion { namespace detail
+{
+    template <typename Tag>
+    struct delimiter_in
+    {
+        // read a delimiter
+        template <typename IS>
+        static void
+        read(IS& is, char const* delim, mpl::false_ = mpl::false_())
+        {
+            detail::string_ios_manip<Tag, IS> manip(is);
+            manip.read(delim);
+        }
+
+        template <typename IS>
+        static void
+        read(IS&, char const*, mpl::true_)
+        {
+        }
+    };
+
+    struct read_sequence_loop
+    {
+        template <typename IS, typename First, typename Last>
+        static void
+        call(IS&, First const&, Last const&, mpl::true_)
+        {
+        }
+
+        template <typename IS, typename First, typename Last>
+        static void
+        call(IS& is, First const& first, Last const& last, mpl::false_)
+        {
+            result_of::equal_to<
+                typename result_of::next<First>::type
+              , Last
+            >
+            is_last;
+
+            is >> *first;
+            delimiter_in<tuple_delimiter_tag>::read(is, " ", is_last);
+            call(is, fusion::next(first), last, is_last);
+        }
+
+        template <typename IS, typename First, typename Last>
+        static void
+        call(IS& is, First const& first, Last const& last)
+        {
+            result_of::equal_to<First, Last> eq;
+            call(is, first, last, eq);
+        }
+    };
+
+    template <typename IS, typename Sequence>
+    inline void
+    read_sequence(IS& is, Sequence& seq)
+    {
+        delimiter_in<tuple_open_tag>::read(is, "(");
+        read_sequence_loop::call(is, fusion::begin(seq), fusion::end(seq));
+        delimiter_in<tuple_close_tag>::read(is, ")");
+    }
+}}}
+
+#endif