diff --git a/Polyhedron/demo/Polyhedron/Scene_edit_polyhedron_item.cpp b/Polyhedron/demo/Polyhedron/Scene_edit_polyhedron_item.cpp
index a66f0a224e2..0a0144cf4d2 100644
--- a/Polyhedron/demo/Polyhedron/Scene_edit_polyhedron_item.cpp
+++ b/Polyhedron/demo/Polyhedron/Scene_edit_polyhedron_item.cpp
@@ -110,6 +110,7 @@ Scene_edit_polyhedron_item::Scene_edit_polyhedron_item
 
 Scene_edit_polyhedron_item::~Scene_edit_polyhedron_item()
 {
+    setVisible(false);
   while(is_there_any_ctrl_vertices_group())
   {
     delete_ctrl_vertices_group(false);