diff --git a/Segment_Delaunay_graph_Linf_2/doc/Segment_Delaunay_graph_Linf_2/PackageDescription.txt b/Segment_Delaunay_graph_Linf_2/doc/Segment_Delaunay_graph_Linf_2/PackageDescription.txt
index c720c82c4de..251c8cfaa07 100644
--- a/Segment_Delaunay_graph_Linf_2/doc/Segment_Delaunay_graph_Linf_2/PackageDescription.txt
+++ b/Segment_Delaunay_graph_Linf_2/doc/Segment_Delaunay_graph_Linf_2/PackageDescription.txt
@@ -55,6 +55,8 @@ are models of the `SegmentDelaunayGraphLinfTraits_2` concept.
 
 ## Classes ##
 
+- `CGAL::Segment_Delaunay_graph_Linf_2<Gt,DS>`
+- `CGAL::Segment_Delaunay_graph_Linf_hierarchy_2<Gt,STag,DS>`
 - `CGAL::Segment_Delaunay_graph_Linf_traits_2<K,MTag>`
 - `CGAL::Segment_Delaunay_graph_Linf_traits_without_intersections_2<K,MTag>`
 - `CGAL::Segment_Delaunay_graph_Linf_filtered_traits_2<CK,CM,EK,EM,FK,FM>`