diff --git a/doc/groups.dox b/doc/groups.dox
--- a/doc/groups.dox
+++ b/doc/groups.dox
@@ -636,8 +636,8 @@
 @ingroup concept
 \brief Skeleton and concept checking classes for graph structures
 
-This group contains the skeletons and concept checking classes of LEMON's
-graph structures and helper classes used to implement these.
+This group contains the skeletons and concept checking classes of
+graph structures.
 */
 
 /**