diff --git a/product/ERP5Type/Base.py b/product/ERP5Type/Base.py
index 1f206973fc461dbbb0ca9451652a1f60b4ad58a5..d7a35206445e8f47826e43b0dfb822b98e63808e 100755
--- a/product/ERP5Type/Base.py
+++ b/product/ERP5Type/Base.py
@@ -1299,7 +1299,7 @@ class Base( CopyContainer, PortalContent, Base18, ActiveObject, ERP5PropertyMana
     else:
       if type(local_permission_list) is type('a'):
         local_permission_list = (local_permission_list,)
-      setattr(self,tuple(permission_name),local_permission_list)
+      setattr(self,permission_name,tuple(local_permission_list))
 
 class TempBase(Base):
   """