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diff --git a/boost/fusion/view/single_view/detail/value_of_impl.hpp b/boost/fusion/view/single_view/detail/value_of_impl.hpp
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+++ b/boost/fusion/view/single_view/detail/value_of_impl.hpp
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+/*=============================================================================
+    Copyright (c) 2001-2011 Joel de Guzman
+    Copyright (c) 2011 Eric Niebler
+
+    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_SINGLE_VIEW_VALUE_OF_IMPL_05052005_0324)
+#define BOOST_FUSION_SINGLE_VIEW_VALUE_OF_IMPL_05052005_0324
+
+#include <boost/mpl/int.hpp>
+#include <boost/mpl/assert.hpp>
+#include <boost/mpl/equal_to.hpp>
+
+namespace boost { namespace fusion
+{
+    struct single_view_iterator_tag;
+
+    namespace extension
+    {
+        template <typename Tag>
+        struct value_of_impl;
+
+        template <>
+        struct value_of_impl<single_view_iterator_tag>
+        {
+            template <typename Iterator>
+            struct apply
+            {
+                BOOST_MPL_ASSERT((mpl::equal_to<typename Iterator::position, mpl::int_<0> >));
+                typedef typename Iterator::value_type type;
+            };
+        };
+    }
+}}
+
+#endif
+
+