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diff --git a/boost/intrusive/detail/equal_to_value.hpp b/boost/intrusive/detail/equal_to_value.hpp
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+/////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga  2014-2014
+//
+// 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/intrusive for documentation.
+//
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_INTRUSIVE_DETAIL_EQUAL_TO_VALUE_HPP
+#define BOOST_INTRUSIVE_DETAIL_EQUAL_TO_VALUE_HPP
+
+#if defined(_MSC_VER)
+#  pragma once
+#endif
+
+namespace boost {
+namespace intrusive {
+namespace detail {
+
+//This functor compares a stored value
+//and the one passed as an argument
+template<class ConstReference>
+class equal_to_value
+{
+   ConstReference t_;
+
+   public:
+   equal_to_value(ConstReference t)
+      :  t_(t)
+   {}
+
+   bool operator()(ConstReference t)const
+   {  return t_ == t;   }
+};
+
+}  //namespace detail{
+}  //namespace intrusive{
+}  //namespace boost{
+
+#endif //BOOST_INTRUSIVE_DETAIL_EQUAL_TO_VALUE_HPP