diff --git a/src/pretix/base/forms/questions.py b/src/pretix/base/forms/questions.py
index 7b9f48986e..ecc0cb5e5a 100644
--- a/src/pretix/base/forms/questions.py
+++ b/src/pretix/base/forms/questions.py
@@ -77,7 +77,9 @@ from pretix.base.forms.widgets import (
 from pretix.base.i18n import (
     get_babel_locale, get_language_without_region, language,
 )
-from pretix.base.invoicing.transmission import get_transmission_types, transmission_types
+from pretix.base.invoicing.transmission import (
+    get_transmission_types, transmission_types,
+)
 from pretix.base.models import InvoiceAddress, Item, Question, QuestionOption
 from pretix.base.models.tax import ask_for_vat_id
 from pretix.base.services.tax import (