diff --git a/product/ERP5/ERP5Site.py b/product/ERP5/ERP5Site.py
index dd161903a44dc576330c0f1ab2f1ec09feb93688..e28c3b64315a707f7d54372ae8bdc70a9e408a5d 100644
--- a/product/ERP5/ERP5Site.py
+++ b/product/ERP5/ERP5Site.py
@@ -1403,7 +1403,7 @@ class ERP5Site(FolderMixIn, CMFSite, CacheCookieMixin):
     
     We consider that a Site is migrated if its Types Tool is migrated
     (it will always be migrated last)"""
-    if self.portal_types.__class__.__module__ == 'erp5.portal_types':
+    if self.portal_types.__class__.__module__ == 'erp5.portal_type':
       # nothing to do
       return True