diff --git a/Mesh_2/include/CGAL/Mesh_2/Clusters.h b/Mesh_2/include/CGAL/Mesh_2/Clusters.h
index fa1d2fa2cb6..73c07e795ef 100644
--- a/Mesh_2/include/CGAL/Mesh_2/Clusters.h
+++ b/Mesh_2/include/CGAL/Mesh_2/Clusters.h
@@ -351,8 +351,8 @@ update_cluster(Cluster& c, iterator it, Vertex_handle va,
         squared_distance(c.smallest_angle.first->point(), c.smallest_angle.second->point()) / FT(4);
   cluster_map.insert(Cluster_map_value_type(va,c));
 #ifdef CGAL_MESH_2_DEBUG_CLUSTERS
-  std::cerr << "Cluster at " << va->point() << " is updated.  "
-            << "\n  vm: " << vm->point()
+  std::cerr << "Cluster at " << IO::oformat(va, With_point_tag{}) << " is updated.  "
+            << "\n  vm: " << IO::oformat(vm, With_point_tag{})
             << "\n  reduction: " << reduction
             << "\n  min_sq_len: " << c.minimum_squared_length
             << "\n";