diff --git a/Polyhedron/demo/Polyhedron/CMakeLists.txt b/Polyhedron/demo/Polyhedron/CMakeLists.txt
index 3895e92f156..d0692c46ea6 100644
--- a/Polyhedron/demo/Polyhedron/CMakeLists.txt
+++ b/Polyhedron/demo/Polyhedron/CMakeLists.txt
@@ -343,7 +343,6 @@ if(CGAL_Qt5_FOUND AND Qt5_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
     TARGETS
     demo_framework
     scene_polyhedron_item
-    scene_basic_objects
     scene_points_with_normal_item
     scene_implicit_function_item
     scene_polylines_item
diff --git a/Three/include/CGAL/Three/Scene_group_item.h b/Three/include/CGAL/Three/Scene_group_item.h
index 23e32663429..8a7c8adc7ce 100644
--- a/Three/include/CGAL/Three/Scene_group_item.h
+++ b/Three/include/CGAL/Three/Scene_group_item.h
@@ -145,8 +145,6 @@ public :
         return;
       update_group_number(item,0);
       item->has_group=0;
-      Scene_group_item* group =
-         qobject_cast<Scene_group_item*>(item);
       children.removeOne(item);
     }
     //!Moves a child up in the list.