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diff --git a/boost/log/utility/functional/fun_ref.hpp b/boost/log/utility/functional/fun_ref.hpp
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+/*
+ *          Copyright Andrey Semashev 2007 - 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)
+ */
+/*!
+ * \file   fun_ref.hpp
+ * \author Andrey Semashev
+ * \date   30.03.2008
+ *
+ * This header contains function object reference adapter. The adapter stores a reference to external
+ * function object and forwards all calls to the referred function.
+ */
+
+#ifndef BOOST_LOG_UTILITY_FUNCTIONAL_FUN_REF_HPP_INCLUDED_
+#define BOOST_LOG_UTILITY_FUNCTIONAL_FUN_REF_HPP_INCLUDED_
+
+#include <boost/log/detail/config.hpp>
+#include <boost/log/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+
+BOOST_LOG_OPEN_NAMESPACE
+
+//! Reference wrapper for function objects
+template< typename FunT >
+struct function_reference_wrapper
+{
+    typedef typename FunT::result_type result_type;
+
+    explicit function_reference_wrapper(FunT& fun) : m_Fun(fun) {}
+
+    result_type operator() () const
+    {
+        return m_Fun();
+    }
+
+#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+    template< typename... ArgsT >
+    result_type operator() (ArgsT const&... args) const
+    {
+        return m_Fun(args...);
+    }
+#else
+    template< typename T >
+    result_type operator() (T const& arg) const
+    {
+        return m_Fun(arg);
+    }
+
+    template< typename T1, typename T2 >
+    result_type operator() (T1 const& arg1, T2 const& arg2) const
+    {
+        return m_Fun(arg1, arg2);
+    }
+#endif
+
+private:
+    FunT& m_Fun;
+};
+
+template< typename FunT >
+BOOST_FORCEINLINE function_reference_wrapper< FunT > fun_ref(FunT& fun)
+{
+    return function_reference_wrapper< FunT >(fun);
+}
+
+BOOST_LOG_CLOSE_NAMESPACE // namespace log
+
+} // namespace boost
+
+#include <boost/log/detail/footer.hpp>
+
+#endif // BOOST_LOG_UTILITY_FUNCTIONAL_FUN_REF_HPP_INCLUDED_