--- boost/bimap/detail/map_view_iterator.hpp
+++ boost/bimap/detail/map_view_iterator.hpp
@@ -165,6 +165,7 @@
       : base_(iter.base()) {}
 	const_map_view_iterator(map_view_iterator<Tag,BimapCore> i)
       : base_(i.base()) {}
+    const_map_view_iterator & operator = (const_map_view_iterator const &) = default;
 
     BOOST_DEDUCED_TYPENAME base_::reference dereference() const
     {