diff --git a/Surface_mesh_topology/doc/Surface_mesh_topology/CGAL/Polygonal_schema_min_items.h b/Surface_mesh_topology/doc/Surface_mesh_topology/CGAL/Polygonal_schema_min_items.h
index 62047a8092b..db4bfee78f9 100644
--- a/Surface_mesh_topology/doc/Surface_mesh_topology/CGAL/Polygonal_schema_min_items.h
+++ b/Surface_mesh_topology/doc/Surface_mesh_topology/CGAL/Polygonal_schema_min_items.h
@@ -4,7 +4,7 @@ namespace Surface_mesh_topology {
 /*!
 \ingroup PkgSurfaceMeshTopologyClasses
 
-The class `Polygonal_schema_min_items` defines a struct with a char* as the information associated with darts, and no attribute is enabled.
+The class `Polygonal_schema_min_items` defines a struct with a std::string as the information associated with darts, and no attribute is enabled.
 
 \cgalModels `PolygonalSchemaItems`
 
@@ -20,9 +20,7 @@ struct Polygonal_schema_min_items
   struct Dart_wrapper
   {
     struct Info_for_darts
-    { char* m_label;
-      Info_for_darts() : m_label(NULL) {}
-    };
+    { std::string m_label; };
     typedef Info_for_darts Dart_info;
   };
 };
diff --git a/Surface_mesh_topology/doc/Surface_mesh_topology/Concepts/PolygonalSchemaItems.h b/Surface_mesh_topology/doc/Surface_mesh_topology/Concepts/PolygonalSchemaItems.h
index 672e42a5936..c07d22280da 100644
--- a/Surface_mesh_topology/doc/Surface_mesh_topology/Concepts/PolygonalSchemaItems.h
+++ b/Surface_mesh_topology/doc/Surface_mesh_topology/Concepts/PolygonalSchemaItems.h
@@ -11,6 +11,7 @@
 
 class PolygonalSchemaItems
 {
+public:
     /*!
   - `%Dart_wrapper<Map>::%Dart_info`, should be a class having a public data member std::string m_label.
     */