diff --git a/GraphicsView/demo/Periodic_2_triangulation_2/Periodic_2_Delaunay_triangulation_2.cpp b/GraphicsView/demo/Periodic_2_triangulation_2/Periodic_2_Delaunay_triangulation_2.cpp
index 740c6f3972b..ae3de731411 100644
--- a/GraphicsView/demo/Periodic_2_triangulation_2/Periodic_2_Delaunay_triangulation_2.cpp
+++ b/GraphicsView/demo/Periodic_2_triangulation_2/Periodic_2_Delaunay_triangulation_2.cpp
@@ -30,8 +30,7 @@
 #include "ui_Periodic_2_triangulation_2.h"
 #include <CGAL/Qt/DemosMainWindow.h>
 
-//typedef CGAL::Exact_predicates_inexact_constructions_kernel     EPIC;
-struct EPIC : public CGAL::Exact_predicates_inexact_constructions_kernel {};
+typedef CGAL::Exact_predicates_inexact_constructions_kernel     EPIC;
 typedef CGAL::Periodic_2_Delaunay_triangulation_traits_2<EPIC>  Gt;
 typedef Gt::Point_2                                             Point_2;
 typedef Gt::Iso_rectangle_2                                     Iso_rectangle_2;