diff --git a/include/boost/concept/usage.hpp b/include/boost/concept/usage.hpp
index 5eee493..21547c3 100644
--- a/include/boost/concept/usage.hpp
+++ b/include/boost/concept/usage.hpp
@@ -39,6 +39,6 @@ struct usage_requirements
 
 # endif 
 
-}} // namespace boost::concept
+}} // namespace boost::concepts
 
 #endif // BOOST_CONCEPT_USAGE_DWA2006919_HPP