diff --git a/product/ERP5Form/ScribusUtils.py b/product/ERP5Form/ScribusUtils.py
index b72919be02674e1789dcd7347cdd4ab08a4cd62f..3ab1f178edef8229df70e842e90dcca86b56a737 100644
--- a/product/ERP5Form/ScribusUtils.py
+++ b/product/ERP5Form/ScribusUtils.py
@@ -112,7 +112,7 @@ class ManageModule:
       selection = selection.split (',')
       if portal_skins_folder_name not in selection:
         new_selection = [portal_skins_folder_name,]
-        new_selection.extends(selection)
+        new_selection.extend(selection)
         portal_skins.manage_skinLayers(skinpath = tuple(new_selection),
                                        skin_name = skin_name,
                                        add_skin = 1)