diff --git a/modules/purchase_trade/sale.py b/modules/purchase_trade/sale.py
index 5838781..75f5138 100755
--- a/modules/purchase_trade/sale.py
+++ b/modules/purchase_trade/sale.py
@@ -331,11 +331,6 @@ class Sale(metaclass=PoolMeta):
             if self.lines.lots:
                 return [l for l in self.lines.lots]
 
-    def get_matched_lines(self):
-        if self.lots:
-            LotQt = Pool().get('lot.qt')
-            return LotQt.search([('lot_s','=',self.lots[0].id),('lot_p','>',0)])
-
     @classmethod
     def validate(cls, sales):
         super(Sale, cls).validate(sales)
@@ -457,6 +452,11 @@ class SaleLine(metaclass=PoolMeta):
     def default_inherit_cer(cls):
         return True
  
+    def get_matched_lines(self):
+        if self.lots:
+            LotQt = Pool().get('lot.qt')
+            return LotQt.search([('lot_s','=',self.lots[0].id),('lot_p','>',0)])
+
     # @fields.depends('quantity')
     # def on_change_with_quantity_theorical(self):
     #     if not self.quantity_theorical: