diff --git a/Packages/Triangulation_2/include/CGAL/Constraint_hierarchy_2.h b/Packages/Triangulation_2/include/CGAL/Constraint_hierarchy_2.h
index 7000f82a1a3..4664516d094 100644
--- a/Packages/Triangulation_2/include/CGAL/Constraint_hierarchy_2.h
+++ b/Packages/Triangulation_2/include/CGAL/Constraint_hierarchy_2.h
@@ -549,15 +549,21 @@ add_Steiner(T va, T vb, T vc){
 
   H_context_list* hcl3;
   if (get_contexts(va,vc,hcl3)) { // (va,vc) is already a subconstraint
-    //hcl3->splice(hcl3->end(), *hcl);
-    hcl3->splice(hcl3->begin(), *hcl);
+#ifdef __SUNPRO_CC
+    std::copy(hcl->begin(), hcl->end(), std::back_inserter(*hcl3));
+#else
+    hcl3->splice(hcl3->end(), *hcl);
+#endif
     delete hcl;
   }
   else   sc_to_c_map.insert(std::make_pair(make_edge(va,vc), hcl));
 
   if (get_contexts(vc,vb,hcl3)) {// (vc,vb) is already a subconstraint
-    //hcl3->splice(hcl3->end(),*hcl2);
-    hcl3->splice(hcl3->begin(), *hcl2);
+#ifdef __SUNPRO_CC    
+    std::copy(hcl2->begin(), hcl2->end(), std::back_inserter(*hcl3));
+#else
+    hcl3->splice(hcl3->end(),*hcl2);
+#endif
     delete hcl2;
   }
   else  sc_to_c_map.insert(std::make_pair(make_edge(vc,vb), hcl2));
diff --git a/Packages/Triangulation_2/test/Triangulation_2/include/CGAL/_test_cls_hierarchy_2.C b/Packages/Triangulation_2/test/Triangulation_2/include/CGAL/_test_cls_hierarchy_2.C
index d707a33ea45..a8fec23f6bc 100644
--- a/Packages/Triangulation_2/test/Triangulation_2/include/CGAL/_test_cls_hierarchy_2.C
+++ b/Packages/Triangulation_2/test/Triangulation_2/include/CGAL/_test_cls_hierarchy_2.C
@@ -91,12 +91,12 @@ _test_cls_hierarchy_2()
   vit = co_it->vertices_begin();
   assert ( *vit++ == v[1] && 
 	   *vit++ == v[5] &&
-	   *vit++ == v[8]);
+	   *vit++ == v[2]);
   co_it++;
   vit = co_it->vertices_begin();
   assert ( *vit++ == v[1] && 
 	   *vit++ == v[5] &&
-	   *vit++ == v[2]);
+	   *vit++ == v[8]);
   co_it++;
   assert (co_it  == h.contexts_end(v[1],v[5]));