diff --git a/product/ERP5Type/Tool/TypesTool.py b/product/ERP5Type/Tool/TypesTool.py
index 7aa383d04e92841943ad413bf6e5ab016b42d736..a1742b45207bd9644a305f1724e3606da8dd8fa6 100644
--- a/product/ERP5Type/Tool/TypesTool.py
+++ b/product/ERP5Type/Tool/TypesTool.py
@@ -104,6 +104,7 @@ class TypesTool(TypeProvider):
       'Business Template',
       'Standard Property',
       'Acquired Property',
+      'Dummy Class Tool',
     ))
 
   def listContentTypes(self, container=None):