diff --git a/include/boost/move/detail/iterator_traits.hpp b/include/boost/move/detail/iterator_traits.hpp
index 5ffcb2c..d31a72c 100644
--- a/include/boost/move/detail/iterator_traits.hpp
+++ b/include/boost/move/detail/iterator_traits.hpp
@@ -33,6 +33,7 @@ struct forward_iterator_tag;
 struct bidirectional_iterator_tag;
 struct random_access_iterator_tag;
 struct output_iterator_tag;
+struct contiguous_iterator_tag;
 
 BOOST_MOVE_STD_NS_END
 #include <boost/move/detail/std_ns_end.hpp>