diff --git a/src/pretix/helpers/urls.py b/src/pretix/helpers/urls.py
index 6113350b9d..17f9869470 100644
--- a/src/pretix/helpers/urls.py
+++ b/src/pretix/helpers/urls.py
@@ -5,4 +5,6 @@ from django.urls import reverse
 
 
 def build_absolute_uri(urlname, args=None, kwargs=None):
-    return urljoin(settings.SITE_URL, reverse(urlname, args=args, kwargs=kwargs))
+    from pretix.multidomain import maindomain_urlconf
+
+    return urljoin(settings.SITE_URL, reverse(urlname, args=args, kwargs=kwargs, urlconf=maindomain_urlconf))