diff --git a/BGL/include/CGAL/boost/graph/internal/helpers.h b/BGL/include/CGAL/boost/graph/internal/helpers.h
index b6c0d6ea142..154f2116e76 100644
--- a/BGL/include/CGAL/boost/graph/internal/helpers.h
+++ b/BGL/include/CGAL/boost/graph/internal/helpers.h
@@ -173,7 +173,7 @@ bool
 is_isolated(typename boost::graph_traits<Graph>::vertex_descriptor v,
             Graph& g)
 {
-  return halfedge(v, g) == typename boost::graph_traits<Graph>::null_halfedge();
+  return halfedge(v, g) == boost::graph_traits<Graph>::null_halfedge();
 }
 
 template<typename Graph>