diff --git a/Skin_surface_3/include/CGAL/Compute_anchor_3.h b/Skin_surface_3/include/CGAL/Compute_anchor_3.h
index cde3484c036..2693d493453 100644
--- a/Skin_surface_3/include/CGAL/Compute_anchor_3.h
+++ b/Skin_surface_3/include/CGAL/Compute_anchor_3.h
@@ -443,7 +443,10 @@ compute_anchor_vor (Vertex_handle const v) {
           for (adj_vertex = adj_vertices.begin(); 
                adj_vertex != adj_vertices.end();
                adj_vertex++) {
-            if (v_other != (*adj_vertex)) {
+            if ((v_other != (*adj_vertex)) && (!reg.is_infinite(*adj_vertex))) {
+              CGAL_assertion(!reg.is_infinite(v));
+              CGAL_assertion(!reg.is_infinite(v_other));
+              CGAL_assertion(!reg.is_infinite(*adj_vertex));
               side = test_anchor(v->point(), v_other->point(),
                                  (*adj_vertex)->point());
               if (side==ZERO) {
diff --git a/Skin_surface_3/test/Skin_surface_3/degenerate_test.cpp b/Skin_surface_3/test/Skin_surface_3/degenerate_test.cpp
index 764f4699d14..8c39ee5b3eb 100644
--- a/Skin_surface_3/test/Skin_surface_3/degenerate_test.cpp
+++ b/Skin_surface_3/test/Skin_surface_3/degenerate_test.cpp
@@ -3,6 +3,7 @@
 #include <CGAL/Exact_predicates_exact_constructions_kernel.h>
 #include <CGAL/Skin_surface_3.h>
 #include <CGAL/Polyhedron_3.h>
+#include <CGAL/IO/Polyhedron_iostream.h>
 #include <CGAL/mesh_skin_surface_3.h>
 
 #include <list>
@@ -42,6 +43,8 @@ public:
     CGAL::mesh_skin_surface_3(skin_surface, p);
     
     CGAL_assertion(p.is_valid() && p.is_closed());
+
+    //std::cout << p << std::endl;
   }
 private:
   double s;