diff --git a/Visibility_2/examples/Visibility_2/general_polygon_example.cpp b/Visibility_2/examples/Visibility_2/general_polygon_example.cpp
index c2301115d85..38e4ae9d6da 100644
--- a/Visibility_2/examples/Visibility_2/general_polygon_example.cpp
+++ b/Visibility_2/examples/Visibility_2/general_polygon_example.cpp
@@ -1,14 +1,12 @@
-#include <CGAL/Cartesian.h>
-#include <CGAL/Gmpq.h>
+
 #include <CGAL/Arr_segment_traits_2.h>
 #include <CGAL/Arrangement_2.h>
 #include <CGAL/Triangular_expansion_visibility_2.h>
-
+#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
 
 #include <iostream>
 
-typedef CGAL::Gmpq                                              Number_type;
-typedef CGAL::Cartesian<Number_type>                            Kernel;
+typedef CGAL::Exact_predicates_exact_constructions_kernel       Kernel;
 typedef Kernel::Point_2                                         Point_2;
 typedef Kernel::Segment_2                                       Segment_2;
 typedef CGAL::Arr_segment_traits_2<Kernel>                      Traits_2;