diff --git a/combo/apps/lingo/models.py b/combo/apps/lingo/models.py
index 507121f7..d60d2cde 100644
--- a/combo/apps/lingo/models.py
+++ b/combo/apps/lingo/models.py
@@ -894,14 +894,14 @@ class Transaction(models.Model):
         subject = _('Invoice #%s') % remote_item.display_id
         basket_item, dummy = BasketItem.objects.get_or_create(
             remote_item_id=item_id,
-            defaults=dict(
-                user=self.user,
-                regie=remote_item.regie,
-                source_url='',
-                subject=subject,
-                amount=remote_item.amount,
-                payment_date=self.end_date,
-            ),
+            defaults={
+                'user': self.user,
+                'regie': remote_item.regie,
+                'source_url': '',
+                'subject': subject,
+                'amount': remote_item.amount,
+                'payment_date': self.end_date,
+            },
         )
         return basket_item