diff --git a/sale.py b/sale.py
index a2941e7..7acc0e6 100644
--- a/sale.py
+++ b/sale.py
@@ -414,7 +414,7 @@ class Sale(metaclass=PoolMeta):
             'kind': args['kind'],
             'delivery': delivery,
             'shop': shop.id,
-            'position': args['position'],
+            'position': args.get('position', ''),
             'payment_method': args['payment_method'],
             'warehouse': shop.warehouse.id,
             'salesman': user.employee,