diff --git a/Skin_surface_3/include/CGAL/make_skin_surface_mesh_3.h b/Skin_surface_3/include/CGAL/make_skin_surface_mesh_3.h
index 26c404a7566..53a48f374a5 100644
--- a/Skin_surface_3/include/CGAL/make_skin_surface_mesh_3.h
+++ b/Skin_surface_3/include/CGAL/make_skin_surface_mesh_3.h
@@ -20,7 +20,6 @@
 #ifndef CGAL_MAKE_SKIN_SURFACE_MESH_3_H
 #define CGAL_MAKE_SKIN_SURFACE_MESH_3_H
 
-#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
 #include <CGAL/Skin_surface_traits_3.h>
 #include <CGAL/Skin_surface_3.h>
 #include <CGAL/mesh_skin_surface_3.h>
@@ -42,11 +41,10 @@ void make_skin_surface_mesh_3(Polyhedron_3 &p,
     make_union_of_balls_mesh_3(p,begin,end,nSubdivisions);
   }
 
+
   typedef typename WP_iterator::value_type              Weighted_point;
-  typedef typename Weighted_point::Point                Point;
-  typedef typename Point::R                             K;
+  typedef typename Kernel_traits<Weighted_point>::Kernel K;
   
-//   typedef Exact_predicates_inexact_constructions_kernel K;
   typedef Skin_surface_traits_3<K>                      Traits;
   typedef Skin_surface_3<Traits>                        Skin_surface;
   
diff --git a/Skin_surface_3/include/CGAL/make_union_of_balls_3.h b/Skin_surface_3/include/CGAL/make_union_of_balls_3.h
index 3f04618115c..2f3799bb9d2 100644
--- a/Skin_surface_3/include/CGAL/make_union_of_balls_3.h
+++ b/Skin_surface_3/include/CGAL/make_union_of_balls_3.h
@@ -20,7 +20,6 @@
 #ifndef CGAL_MAKE_UNION_OF_BALLS_MESH_3_H
 #define CGAL_MAKE_UNION_OF_BALLS_MESH_3_H
 
-#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
 #include <CGAL/Skin_surface_traits_3.h>
 #include <CGAL/Union_of_balls_3.h>
 #include <CGAL/mesh_union_of_balls_3.h>
@@ -36,7 +35,9 @@ void make_union_of_balls_mesh_3(Polyhedron_3 &p,
 			      WP_iterator begin, WP_iterator end, 
 			      int nSubdivisions=0)
 {
-  typedef Exact_predicates_inexact_constructions_kernel K;
+  typedef typename WP_iterator::value_type              Weighted_point;
+  typedef typename Kernel_traits<Weighted_point>::Kernel K;
+
   typedef Skin_surface_traits_3<K>                      Traits;
   typedef Union_of_balls_3<Traits>                      Union_of_balls;