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diff --git a/boost/geometry/algorithms/detail/is_simple/debug_print_boundary_points.hpp b/boost/geometry/algorithms/detail/is_simple/debug_print_boundary_points.hpp
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+++ b/boost/geometry/algorithms/detail/is_simple/debug_print_boundary_points.hpp
@@ -0,0 +1,82 @@
+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2014, Oracle and/or its affiliates.
+
+// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
+
+// Licensed under the Boost Software License version 1.0.
+// http://www.boost.org/users/license.html
+
+#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_DEBUG_PRINT_BOUNDARY_POINTS_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_DEBUG_PRINT_BOUNDARY_POINTS_HPP
+
+#ifdef BOOST_GEOMETRY_TEST_DEBUG
+#include <algorithm>
+#include <iostream>
+#include <vector>
+
+#include <boost/range.hpp>
+
+#include <boost/geometry/core/point_type.hpp>
+
+#include <boost/geometry/util/range.hpp>
+
+#include <boost/geometry/io/dsv/write.hpp>
+
+#include <boost/geometry/policies/compare.hpp>
+
+#include <boost/geometry/algorithms/equals.hpp>
+#endif
+
+
+namespace boost { namespace geometry
+{
+
+namespace detail { namespace is_simple
+{
+
+
+#ifdef BOOST_GEOMETRY_TEST_DEBUG
+template <typename MultiLinestring>
+inline void debug_print_boundary_points(MultiLinestring const& multilinestring)
+{
+    typedef typename point_type<MultiLinestring>::type point_type;
+    typedef std::vector<point_type> point_vector;
+
+    point_vector boundary_points;
+    for (typename boost::range_iterator<MultiLinestring const>::type it
+             = boost::begin(multilinestring);
+         it != boost::end(multilinestring); ++it)
+    {
+        if ( boost::size(*it) > 1
+             && !geometry::equals(range::front(*it), range::back(*it)) )
+        {
+            boundary_points.push_back( range::front(*it) );
+            boundary_points.push_back( range::back(*it) );
+        }
+    }
+
+    std::sort(boundary_points.begin(), boundary_points.end(),
+              geometry::less<point_type>());
+
+    std::cout << "boundary points: ";
+    for (typename point_vector::const_iterator pit = boundary_points.begin();
+         pit != boundary_points.end(); ++pit)
+    {
+        std::cout << " " << geometry::dsv(*pit);
+    }
+    std::cout << std::endl << std::endl;
+}
+#else
+template <typename MultiLinestring>
+inline void debug_print_boundary_points(MultiLinestring const&)
+{
+}
+#endif // BOOST_GEOMETRY_TEST_DEBUG
+
+
+}} // namespace detail::is_simple
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_DEBUG_PRINT_BOUNDARY_POINTS_HPP