diff --git a/src/pretix/presale/views/customer.py b/src/pretix/presale/views/customer.py
index 0d122d721..693128b1c 100644
--- a/src/pretix/presale/views/customer.py
+++ b/src/pretix/presale/views/customer.py
@@ -743,7 +743,7 @@ class SSOLoginReturnView(RedirectBackMixin, View):
                     popup_origin,
                 )
 
-            nonce, redirect_to = re.split("[%#§]", request.GET['state'], 1)  # Allow § and # for backwards-compatibility for a while
+            nonce, redirect_to = re.split("[%#§]", request.GET['state'], maxsplit=1)  # Allow § and # for backwards-compatibility for a while
 
             if nonce != request.session.get(f'pretix_customerauth_{self.provider.pk}_nonce'):
                 return self._fail(