diff --git a/Triangulation_3/include/CGAL/Triangulation_data_structure_3.h b/Triangulation_3/include/CGAL/Triangulation_data_structure_3.h
index 463b3abca01..63b377db2b6 100644
--- a/Triangulation_3/include/CGAL/Triangulation_data_structure_3.h
+++ b/Triangulation_3/include/CGAL/Triangulation_data_structure_3.h
@@ -831,7 +831,9 @@ public:
     Filter filter;
   public:
     Vertex_extractor(Vertex_handle _v, OutputIterator _output, const Tds* _t, Filter _filter):
-    v(_v), treat(_output), t(_t), filter(_filter) {
+    v(_v), treat(_output), t(_t), filter(_filter) 
+    {
+      tmp_vertices.reserve(64);
     }
 
     void operator()(Cell_handle c) {