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diff --git a/boost_ext/boost/multi_index/detail/value_compare.hpp b/boost_ext/boost/multi_index/detail/value_compare.hpp
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+/* Copyright 2003-2007 Joaquín M López Muñoz.
+ * 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/multi_index for library home page.
+ */
+
+#ifndef BOOST_MULTI_INDEX_DETAIL_VALUE_COMPARE_HPP
+#define BOOST_MULTI_INDEX_DETAIL_VALUE_COMPARE_HPP
+
+#if defined(_MSC_VER)&&(_MSC_VER>=1200)
+#pragma once
+#endif
+
+#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
+#include <boost/call_traits.hpp>
+#include <functional>
+
+namespace boost{
+
+namespace multi_index{
+
+namespace detail{
+
+template<typename Value,typename KeyFromValue,typename Compare>
+struct value_comparison:std::binary_function<Value,Value,bool>
+{
+  value_comparison(
+    const KeyFromValue& key_=KeyFromValue(),const Compare& comp_=Compare()):
+    key(key_),comp(comp_)
+  {
+  }
+
+  bool operator()(
+    typename call_traits<Value>::param_type x,
+    typename call_traits<Value>::param_type y)const
+  {
+    return comp(key(x),key(y));
+  }
+
+private:
+  KeyFromValue key;
+  Compare      comp;
+};
+
+} /* namespace multi_index::detail */
+
+} /* namespace multi_index */
+
+} /* namespace boost */
+
+#endif