diff --git a/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/Concepts/Periodic_2TriangulationTraits_2.h b/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/Concepts/Periodic_2TriangulationTraits_2.h
index 55b9115ee30..deb42512aa3 100644
--- a/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/Concepts/Periodic_2TriangulationTraits_2.h
+++ b/Periodic_2_triangulation_2/doc/Periodic_2_triangulation_2/Concepts/Periodic_2TriangulationTraits_2.h
@@ -67,7 +67,7 @@ public:
   /*!
   A type representing an
   axis-aligned rectangle. It must be a model of
-  `Kernel::Iso_rectangle_2`.
+  `Kernel::IsoRectangle_2`.
   */
   typedef unspecified_type Iso_rectangle_2;
 
diff --git a/Periodic_3_triangulation_3/doc/Periodic_3_triangulation_3/Concepts/Periodic_3TriangulationTraits_3.h b/Periodic_3_triangulation_3/doc/Periodic_3_triangulation_3/Concepts/Periodic_3TriangulationTraits_3.h
index 4f806a44bd8..4fcef2c066c 100644
--- a/Periodic_3_triangulation_3/doc/Periodic_3_triangulation_3/Concepts/Periodic_3TriangulationTraits_3.h
+++ b/Periodic_3_triangulation_3/doc/Periodic_3_triangulation_3/Concepts/Periodic_3TriangulationTraits_3.h
@@ -51,7 +51,7 @@ typedef unspecified_type Periodic_3_offset_3;
 
 /*!
 A type representing an axis-aligned
-cuboid. It must be a model of `Kernel::Iso_cuboid_3`.
+cuboid. It must be a model of `Kernel::IsoCuboid_3`.
 */
 typedef unspecified_type Iso_cuboid_3;