diff --git a/Envelope_3/demo/Envelope_3/typedefs.h b/Envelope_3/demo/Envelope_3/typedefs.h
index a48694f1faf..e96df393986 100644
--- a/Envelope_3/demo/Envelope_3/typedefs.h
+++ b/Envelope_3/demo/Envelope_3/typedefs.h
@@ -130,9 +130,10 @@ typedef Double_kernel::Point_2                          Double_point_2;
 typedef CGAL::Polygon_2<Double_kernel>                  Polygon_2;
 
 template<class Arrangement, class OutputIterator>
-class Faces_visitor : public CGAL::_Arr_default_overlay_traits<Arrangement,
-                                           Arrangement,
-                                           Arrangement>
+class Faces_visitor :
+  public CGAL::Arr_overlay_traits_2<typename Arrangement::Geometry_traits_2,
+                                    Arrangement,
+                                    Arrangement>
 {
 private:
   typedef typename Arrangement::Vertex_const_handle     V_const_handle;