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diff --git a/boost/geometry/algorithms/detail/multi_sum.hpp b/boost/geometry/algorithms/detail/multi_sum.hpp
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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
+// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
+// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
+
+// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
+// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
+
+// Use, modification and distribution is subject to 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)
+
+#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_MULTI_SUM_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_MULTI_SUM_HPP
+
+#include <boost/range.hpp>
+
+
+namespace boost { namespace geometry
+{
+#ifndef DOXYGEN_NO_DETAIL
+namespace detail
+{
+
+struct multi_sum
+{
+    template <typename ReturnType, typename Policy, typename MultiGeometry, typename Strategy>
+    static inline ReturnType apply(MultiGeometry const& geometry, Strategy const& strategy)
+    {
+        ReturnType sum = ReturnType();
+        for (typename boost::range_iterator
+                <
+                    MultiGeometry const
+                >::type it = boost::begin(geometry);
+            it != boost::end(geometry);
+            ++it)
+        {
+            sum += Policy::apply(*it, strategy);
+        }
+        return sum;
+    }
+};
+
+
+} // namespace detail
+#endif
+
+}} // namespace boost::geometry
+
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_MULTI_SUM_HPP