diff --git a/include/boost/move/detail/type_traits.hpp b/include/boost/move/detail/type_traits.hpp
index 8e67755..ab79fb1 100644
--- a/include/boost/move/detail/type_traits.hpp
+++ b/include/boost/move/detail/type_traits.hpp
@@ -343,6 +343,17 @@ template<class T>
 struct is_pointer<T*>
 {  static const bool value = true; };
 
+//////////////////////////
+//       is_const
+//////////////////////////
+template<class T>
+struct is_const
+{  static const bool value = false; };
+
+template<class T>
+struct is_const<const T>
+{  static const bool value = true; };
+
 //////////////////////////
 //       unvoid_ref
 //////////////////////////