diff --git a/src/slic3r/GUI/GUI_ObjectList.cpp b/src/slic3r/GUI/GUI_ObjectList.cpp
index 1a4245965..2fbf4baa1 100644
--- a/src/slic3r/GUI/GUI_ObjectList.cpp
+++ b/src/slic3r/GUI/GUI_ObjectList.cpp
@@ -1886,7 +1886,8 @@ void ObjectList::part_selection_changed()
 
         if (item) {
             wxGetApp().obj_manipul()->get_og()->set_value("object_name", m_objects_model->GetName(item));
-            wxGetApp().obj_manipul()->update_manifold_warning_icon_state(get_mesh_errors_list(obj_idx, volume_id));
+            const wxString& tooltip = get_mesh_errors_list(obj_idx, volume_id);
+            wxGetApp().obj_manipul()->update_manifold_warning_icon_state(tooltip);
         }
     }