diff --git a/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/CGAL/Periodic_2_triangulation_face_base_2.h b/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/CGAL/Periodic_2_triangulation_face_base_2.h
index a7233bee1a3..c2a0bb9ea94 100644
--- a/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/CGAL/Periodic_2_triangulation_face_base_2.h
+++ b/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/CGAL/Periodic_2_triangulation_face_base_2.h
@@ -2,7 +2,7 @@
 namespace CGAL {
 
 /*!
-\ingroup PkgPeriodic2Triangulation2
+\ingroup PkgPeriodic2Triangulation2MainClasses
 
 The class `Periodic_2_triangulation_face_base_2` is a model of 
 the concept `Periodic_2TriangulationFaceBase_2` to be used by