diff --git a/price_list.py b/price_list.py
index b2a352f37f..33f3b90a36 100644
--- a/price_list.py
+++ b/price_list.py
@@ -106,7 +106,7 @@ class PriceList(ModelSQL, ModelView):
                 with Transaction().set_context(
                         self._get_context_price_list_line(party, product,
                             unit_price, quantity, uom)):
-                    return line.get_unit_price(line)
+                    return line.get_unit_price()
         return unit_price