diff --git a/ndb/include/ndbapi/Ndb.hpp b/ndb/include/ndbapi/Ndb.hpp
index 9ff7f2cf5f5cd22774fd00f8a253cf8a921ee762..0891682c21f81c3b465f167353ee30a4a25dbbc7 100644
--- a/ndb/include/ndbapi/Ndb.hpp
+++ b/ndb/include/ndbapi/Ndb.hpp
@@ -39,7 +39,7 @@
    It is also possible to receive "events" triggered when data in the database in changed.
    This is done through the NdbEventOperation class.
 
-   There are also some auxiliary classes.
+   There are also some auxiliary classes, which are listed in the @ref hierarchy.
      
    The main structure of an application program is as follows:
    -# Construct and connect to a cluster using the Ndb_cluster_connection