diff --git a/product/ERP5Type/Tool/TypesTool.py b/product/ERP5Type/Tool/TypesTool.py
index 14d08179a778120450bf66e0d5aa3cfa35f7ec60..690f5722d66ae4de9746881becbf761778f16391 100644
--- a/product/ERP5Type/Tool/TypesTool.py
+++ b/product/ERP5Type/Tool/TypesTool.py
@@ -128,9 +128,6 @@ class TypesTool(TypeProvider):
       'Standard Property',
       'Acquired Property',
       'Dummy Class Tool',
-      # XXX the following ones are required by '_migrateToPortalTypeClass'
-      'Types Tool',
-      'Property Sheet Tool',
       # the following ones are required to upgrade an existing site
       'Category Property',
     ))