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diff --git a/boost/accumulators/statistics/weighted_moment.hpp b/boost/accumulators/statistics/weighted_moment.hpp
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+///////////////////////////////////////////////////////////////////////////////
+// weighted_moment.hpp
+//
+//  Copyright 2006, Eric Niebler, Olivier Gygi. 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)
+
+#ifndef BOOST_ACCUMULATORS_STATISTICS_WEIGHTED_MOMENT_HPP_EAN_15_11_2005
+#define BOOST_ACCUMULATORS_STATISTICS_WEIGHTED_MOMENT_HPP_EAN_15_11_2005
+
+#include <boost/config/no_tr1/cmath.hpp>
+#include <boost/mpl/int.hpp>
+#include <boost/mpl/assert.hpp>
+#include <boost/mpl/placeholders.hpp>
+#include <boost/preprocessor/arithmetic/inc.hpp>
+#include <boost/preprocessor/repetition/repeat_from_to.hpp>
+#include <boost/preprocessor/repetition/enum_trailing_params.hpp>
+#include <boost/preprocessor/repetition/enum_trailing_binary_params.hpp>
+#include <boost/accumulators/framework/accumulator_base.hpp>
+#include <boost/accumulators/framework/extractor.hpp>
+#include <boost/accumulators/numeric/functional.hpp>
+#include <boost/accumulators/framework/parameters/sample.hpp>
+#include <boost/accumulators/framework/depends_on.hpp>
+#include <boost/accumulators/statistics_fwd.hpp>
+#include <boost/accumulators/statistics/count.hpp>
+#include <boost/accumulators/statistics/moment.hpp> // for pow()
+#include <boost/accumulators/statistics/sum.hpp>
+
+namespace boost { namespace accumulators
+{
+
+namespace impl
+{
+    ///////////////////////////////////////////////////////////////////////////////
+    // weighted_moment_impl
+    template<typename N, typename Sample, typename Weight>
+    struct weighted_moment_impl
+      : accumulator_base // TODO: also depends_on sum of powers
+    {
+        BOOST_MPL_ASSERT_RELATION(N::value, >, 0);
+        typedef typename numeric::functional::multiplies<Sample, Weight>::result_type weighted_sample;
+        // for boost::result_of
+        typedef typename numeric::functional::average<weighted_sample, Weight>::result_type result_type;
+
+        template<typename Args>
+        weighted_moment_impl(Args const &args)
+          : sum(args[sample | Sample()] * numeric::one<Weight>::value)
+        {
+        }
+
+        template<typename Args>
+        void operator ()(Args const &args)
+        {
+            this->sum += args[weight] * numeric::pow(args[sample], N());
+        }
+
+        template<typename Args>
+        result_type result(Args const &args) const
+        {
+            return numeric::average(this->sum, sum_of_weights(args));
+        }
+
+    private:
+        weighted_sample sum;
+    };
+
+} // namespace impl
+
+///////////////////////////////////////////////////////////////////////////////
+// tag::weighted_moment
+//
+namespace tag
+{
+    template<int N>
+    struct weighted_moment
+      : depends_on<count, sum_of_weights>
+    {
+        /// INTERNAL ONLY
+        ///
+        typedef accumulators::impl::weighted_moment_impl<mpl::int_<N>, mpl::_1, mpl::_2> impl;
+    };
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// extract::weighted_moment
+//
+namespace extract
+{
+    BOOST_ACCUMULATORS_DEFINE_EXTRACTOR(tag, weighted_moment, (int))
+}
+
+using extract::weighted_moment;
+
+}} // namespace boost::accumulators
+
+#endif