diff --git a/Minkowski_sum_3/include/CGAL/Minkowski_sum_3/Gaussian_map.h b/Minkowski_sum_3/include/CGAL/Minkowski_sum_3/Gaussian_map.h
index 990ef941b32..9d6c06380ab 100644
--- a/Minkowski_sum_3/include/CGAL/Minkowski_sum_3/Gaussian_map.h
+++ b/Minkowski_sum_3/include/CGAL/Minkowski_sum_3/Gaussian_map.h
@@ -70,6 +70,18 @@ class Gaussian_map :
 
   typedef typename Sphere_map::Object_handle              Object_handle;
 
+  using Base::clear_face_cycle_entries;
+  using Base::is_closed_at_source;
+  using Base::delete_edge_pair;
+  using Base::delete_vertex_only;
+  using Base::delete_face_only;
+  using Base::set_face;
+  using Base::store_sm_boundary_object;
+  using Base::is_isolated;
+  using Base::has_outdeg_two;
+  using Base::first_out_edge;
+  using Base::merge_edge_pairs_at_target;
+  
   template<typename Nef_polyhedron_3>
   class SVertex_creator2 {
 
@@ -85,18 +97,6 @@ class Gaussian_map :
     SM_decorator SM;
     Facet2SVertex_hash& Facet2SVertex;
 
-    using Base::clear_face_cycle_entries;
-    using Base::is_closed_at_source;
-    using Base::delete_edge_pair;
-    using Base::delete_vertex_only;
-    using Base::delete_face_only;
-    using Base::set_face;
-    using Base::store_sm_boundary_object;
-    using Base::is_isolated;
-    using Base::has_outdeg_two;
-    using Base::first_out_edge;
-    using Base::merge_edge_pairs_at_target;
-    
   public:
     SVertex_creator2(Sphere_map* smap, Facet2SVertex_hash& F2SV)
       : SM(smap), Facet2SVertex(F2SV) {}