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diff --git a/boost/geometry/strategies/spherical/envelope_segment.hpp b/boost/geometry/strategies/spherical/envelope_segment.hpp
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+++ b/boost/geometry/strategies/spherical/envelope_segment.hpp
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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2017 Oracle and/or its affiliates.
+// Contributed and/or modified by Vissarion Fisikopoulos, on behalf of Oracle
+// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
+
+// 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_STRATEGIES_SPHERICAL_ENVELOPE_SEGMENT_HPP
+#define BOOST_GEOMETRY_STRATEGIES_SPHERICAL_ENVELOPE_SEGMENT_HPP
+
+#include <boost/geometry/algorithms/detail/envelope/segment.hpp>
+#include <boost/geometry/algorithms/detail/normalize.hpp>
+#include <boost/geometry/strategies/envelope.hpp>
+#include <boost/geometry/strategies/spherical/azimuth.hpp>
+
+namespace boost { namespace geometry
+{
+
+namespace strategy { namespace envelope
+{
+
+template
+<
+    typename CalculationType = void
+>
+class spherical_segment
+{
+public :
+
+    inline spherical_segment()
+    {}
+
+    template <typename Point1, typename Point2, typename Box>
+    inline void
+    apply(Point1 const& point1, Point2 const& point2, Box& box) const
+    {
+        Point1 p1_normalized = detail::return_normalized<Point1>(point1);
+        Point2 p2_normalized = detail::return_normalized<Point2>(point2);
+
+        geometry::strategy::azimuth::spherical<CalculationType> azimuth_spherical;
+
+        typedef typename coordinate_system<Point1>::type::units units_type;
+
+        geometry::detail::envelope::envelope_segment_impl<spherical_equatorial_tag>
+                ::template apply<units_type>(geometry::get<0>(p1_normalized),
+                                             geometry::get<1>(p1_normalized),
+                                             geometry::get<0>(p2_normalized),
+                                             geometry::get<1>(p2_normalized),
+                                             box,
+                                             azimuth_spherical);
+
+  }
+};
+
+#ifndef DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
+
+namespace services
+{
+
+template <typename CalculationType>
+struct default_strategy<spherical_equatorial_tag, CalculationType>
+{
+    typedef strategy::envelope::spherical_segment<CalculationType> type;
+};
+
+
+template <typename CalculationType>
+struct default_strategy<spherical_polar_tag, CalculationType>
+{
+    typedef strategy::envelope::spherical_segment<CalculationType> type;
+};
+
+}
+
+#endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
+
+
+}} // namespace strategy::envelope
+
+}} //namepsace boost::geometry
+
+#endif // BOOST_GEOMETRY_STRATEGIES_SPHERICAL_ENVELOPE_SEGMENT_HPP
+