diff --git a/product/ERP5/Document/InvoicingRule.py b/product/ERP5/Document/InvoicingRule.py
index df105eae4a48c6fae670a937f739adc5c122aef0..019c0096b4d3bd69123a96a82950965e6d9e3774 100644
--- a/product/ERP5/Document/InvoicingRule.py
+++ b/product/ERP5/Document/InvoicingRule.py
@@ -152,11 +152,6 @@ class InvoicingRule(Rule):
           applied_rule._delObject(movement_id)
       
         for movement, prop_dict in modify_dict.items():
-          #XXX ignore start_date and stop_date if the difference is smaller than a
-          # rule defined value
-          for prop in ('start_date', 'stop_date'):
-           if prop in prop_dict.keys():
-              prop_dict.pop(prop)
           applied_rule[movement].edit(**prop_dict)
 
         for movement_dict in add_list: