Index: visitation_impl.hpp
===================================================================
--- visitation_impl.hpp	(revision 45135)
+++ visitation_impl.hpp	(working copy)
@@ -35,6 +35,10 @@
 #include "boost/type_traits/has_nothrow_copy.hpp"
 #include "boost/variant/detail/has_nothrow_move.hpp"
 
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
+# pragma warning (push)
+# pragma warning (disable : 4702) //unreachable code
+#endif
 
 ///////////////////////////////////////////////////////////////////////////////
 // BOOST_VARIANT_VISITATION_UNROLLING_LIMIT
@@ -283,4 +287,8 @@
 }} // namespace detail::variant
 } // namespace boost
 
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) 
+# pragma warning(pop) 
+#endif
+
 #endif // BOOST_VARIANT_DETAIL_VISITATION_IMPL_HPP