diff --git a/product/ERP5/Document/TradeCondition.py b/product/ERP5/Document/TradeCondition.py
index aea5de793e61234ea8f41dd61fed0ec9afcb480c..c3629dc7d7cf18d724e4a77cc1a442c321f3d95c 100644
--- a/product/ERP5/Document/TradeCondition.py
+++ b/product/ERP5/Document/TradeCondition.py
@@ -69,6 +69,9 @@ class TradeCondition(Path, Transformation):
                       )
 
     def updateAggregatedAmountList(self, context, **kw):
+      '''
+        updates exisiting movement and returns new if any
+      '''
       existing_movement_list = context.getMovementList()
       aggregated_amount_list = self.getAggregatedAmountList(context = context,
           **kw)