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diff --git a/boost/geometry/algorithms/detail/is_simple/always_simple.hpp b/boost/geometry/algorithms/detail/is_simple/always_simple.hpp
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+// 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_ALWAYS_SIMPLE_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_ALWAYS_SIMPLE_HPP
+
+#include <boost/geometry/core/tags.hpp>
+
+#include <boost/geometry/algorithms/dispatch/is_simple.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+
+#ifndef DOXYGEN_NO_DETAIL
+namespace detail { namespace is_simple
+{
+
+
+template <typename Geometry>
+struct always_simple
+{
+    static inline bool apply(Geometry const&)
+    {
+        return true;
+    }
+};
+
+
+}} // namespace detail::is_simple
+#endif // DOXYGEN_NO_DETAIL
+
+
+
+
+#ifndef DOXYGEN_NO_DISPATCH
+namespace dispatch
+{
+
+
+// A point is always simple
+template <typename Point>
+struct is_simple<Point, point_tag>
+    : detail::is_simple::always_simple<Point>
+{};
+
+
+// A valid segment is always simple.
+// A segment is a curve.
+// A curve is simple if it does not pass through the same point twice,
+// with the possible exception of its two endpoints
+//
+// Reference: OGC 06-103r4 (6.1.6.1)
+template <typename Segment>
+struct is_simple<Segment, segment_tag>
+    : detail::is_simple::always_simple<Segment>
+{};
+
+
+// A valid box is always simple
+// A box is a Polygon, and it satisfies the conditions for Polygon validity.
+//
+// Reference (for polygon validity): OGC 06-103r4 (6.1.11.1)
+template <typename Box>
+struct is_simple<Box, box_tag>
+    : detail::is_simple::always_simple<Box>
+{};
+
+
+} // namespace dispatch
+#endif // DOXYGEN_NO_DISPATCH
+
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_SIMPLE_ALWAYS_SIMPLE_HPP