diff --git a/Mesh_3/include/CGAL/Mesh_domain_with_polyline_features_3.h b/Mesh_3/include/CGAL/Mesh_domain_with_polyline_features_3.h
index 458e9ea5050..970fbf0089a 100644
--- a/Mesh_3/include/CGAL/Mesh_domain_with_polyline_features_3.h
+++ b/Mesh_3/include/CGAL/Mesh_domain_with_polyline_features_3.h
@@ -649,9 +649,11 @@ public:
   }
 
   void build_curves_aabb_tree() const {
+#if CGAL_MESH_3_VERBOSE
     std::cerr << "Building curves AABB tree...";
     CGAL::Real_timer timer;
     timer.start();
+#endif
     curves_aabb_tree_.clear();
     for(typename Edges::const_iterator
           edges_it = edges_.begin(),
@@ -669,9 +671,10 @@ public:
     }
     curves_aabb_tree_.build();
     curves_aabb_tree_is_built = true;
+#if CGAL_MESH_3_VERBOSE
     timer.stop();
     std::cerr << " done (" << timer.time() * 1000 << " ms)" << std::endl;
-
+#endif
   } // end build_curves_aabb_tree()
 
 private:
diff --git a/Mesh_3/include/CGAL/Polyhedral_mesh_domain_with_features_3.h b/Mesh_3/include/CGAL/Polyhedral_mesh_domain_with_features_3.h
index f70959fb004..1d85e183aef 100644
--- a/Mesh_3/include/CGAL/Polyhedral_mesh_domain_with_features_3.h
+++ b/Mesh_3/include/CGAL/Polyhedral_mesh_domain_with_features_3.h
@@ -464,9 +464,8 @@ add_features_from_split_graph_into_polylines(const Polyhedron& p,
     BOOST_FOREACH(Graph_edge_descriptor e, edges(graph)){
       vertex_descriptor vs = p2vmap[source(e,graph)->point()];
       vertex_descriptor vt = p2vmap[target(e,graph)->point()];
-      if(vs == vt){
-        std::cerr << "ignore self loop\n";
-      }else{
+      CGAL_warning_msg(vs != vt, "ignore self loop");
+      if(vs != vt) {
         const std::pair<edge_descriptor, bool> pair = add_edge(vs,vt,g_copy);
         typename Polyhedron::Halfedge_handle he = halfedge(e, p);
         if(!is_border(he, p)) {