diff --git a/product/ERP5/Document/SupplyLine.py b/product/ERP5/Document/SupplyLine.py
index 73915cf494233b1b8387b3c5773c496947c541ad..f7dacf36feba9c24804fc0f49c9d898be0af3a4e 100755
--- a/product/ERP5/Document/SupplyLine.py
+++ b/product/ERP5/Document/SupplyLine.py
@@ -222,7 +222,7 @@ class SupplyLine(DeliveryLine, Path):
       return getattr(self, method_name)()
 
     security.declareProtected(Permissions.ModifyPortalContent, 
-                              'updatePredicate')
+                              'updateQuantityPredicate')
     def updateQuantityPredicate(self, price_parameter):
       """
         Update the quantity predicate