diff --git a/include/boost/unordered/concurrent_flat_map_fwd.hpp b/include/boost/unordered/concurrent_flat_map_fwd.hpp
index 308f099c..a4d76cc0 100644
--- a/include/boost/unordered/concurrent_flat_map_fwd.hpp
+++ b/include/boost/unordered/concurrent_flat_map_fwd.hpp
@@ -49,10 +49,10 @@ namespace boost {
 
   } // namespace unordered
 
-  using unordered::concurrent_flat_map;
-  using unordered::swap;
-  using unordered::operator==;
-  using unordered::operator!=;
+  using boost::unordered::concurrent_flat_map;
+  using boost::unordered::swap;
+  using boost::unordered::operator==;
+  using boost::unordered::operator!=;
 } // namespace boost
 
 #endif // BOOST_UNORDERED_CONCURRENT_FLAT_MAP_HPP