diff --git a/Alpha_shapes_3/examples/Alpha_shapes_3/ex_alpha_shapes_with_hierarchy_3.cpp b/Alpha_shapes_3/examples/Alpha_shapes_3/ex_alpha_shapes_with_hierarchy_3.cpp
index 373ec3bc817..56de6cdd155 100644
--- a/Alpha_shapes_3/examples/Alpha_shapes_3/ex_alpha_shapes_with_hierarchy_3.cpp
+++ b/Alpha_shapes_3/examples/Alpha_shapes_3/ex_alpha_shapes_with_hierarchy_3.cpp
@@ -7,13 +7,13 @@
 #include <list>
 #include <cassert>
 
-typedef CGAL::Exact_predicates_inexact_constructions_kernel Gt;
+typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
 
-typedef CGAL::Alpha_shape_vertex_base_3<Gt>               Vb;
+typedef CGAL::Alpha_shape_vertex_base_3<K>               Vb;
 typedef CGAL::Triangulation_hierarchy_vertex_base_3<Vb>  Vbh;
-typedef CGAL::Alpha_shape_cell_base_3<Gt>                 Fb;
+typedef CGAL::Alpha_shape_cell_base_3<K>                 Fb;
 typedef CGAL::Triangulation_data_structure_3<Vbh,Fb>     Tds;
-typedef CGAL::Delaunay_triangulation_3<Gt,Tds>            Delaunay;
+typedef CGAL::Delaunay_triangulation_3<K,Tds>            Delaunay;
 typedef CGAL::Triangulation_hierarchy_3<Delaunay>        Delaunay_hierarchy;
 typedef CGAL::Alpha_shape_3<Delaunay_hierarchy>          Alpha_shape_3;