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diff --git a/boost/geometry/algorithms/detail/is_valid/interface.hpp b/boost/geometry/algorithms/detail/is_valid/interface.hpp
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+++ b/boost/geometry/algorithms/detail/is_valid/interface.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_VALID_INTERFACE_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_INTERFACE_HPP
+
+#include <boost/variant/static_visitor.hpp>
+#include <boost/variant/apply_visitor.hpp>
+#include <boost/variant/variant_fwd.hpp>
+
+#include <boost/geometry/geometries/concepts/check.hpp>
+
+#include <boost/geometry/algorithms/dispatch/is_valid.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+
+namespace resolve_variant {
+
+template <typename Geometry>
+struct is_valid
+{
+    static inline bool apply(Geometry const& geometry)
+    {
+        concept::check<Geometry const>();
+        return dispatch::is_valid<Geometry>::apply(geometry);
+    }
+};
+
+template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
+struct is_valid<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
+{
+    struct visitor : boost::static_visitor<bool>
+    {
+        template <typename Geometry>
+        bool operator()(Geometry const& geometry) const
+        {
+            return is_valid<Geometry>::apply(geometry);
+        }
+    };
+
+    static inline bool
+    apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry)
+    {
+        return boost::apply_visitor(visitor(), geometry);
+    }
+};
+
+} // namespace resolve_variant
+
+
+/*!
+\brief \brief_check{is valid (in the OGC sense)}
+\ingroup is_valid
+\tparam Geometry \tparam_geometry
+\param geometry \param_geometry
+\return \return_check{is valid (in the OGC sense)}
+
+\qbk{[include reference/algorithms/is_valid.qbk]}
+*/
+template <typename Geometry>
+inline bool is_valid(Geometry const& geometry)
+{
+    return resolve_variant::is_valid<Geometry>::apply(geometry);
+}
+
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_IS_VALID_INTERFACE_HPP