diff --git a/src/pretix/base/models/vouchers.py b/src/pretix/base/models/vouchers.py
index c5373a40a..d314c1ed2 100644
--- a/src/pretix/base/models/vouchers.py
+++ b/src/pretix/base/models/vouchers.py
@@ -48,8 +48,9 @@ class Voucher(LoggedModel):
     :type quota: Quota
     :param comment: An internal comment that will only be visible to staff, and never displayed to the user
     :type comment: str
-	:param tag: Use this field to group multiple vouchers together. If you enter the same value for multiple vouchers, you can get statistics on how many of them have been redeemed etc.
-	:type tag: str
+    :param tag: Use this field to group multiple vouchers together. If you enter the same value for multiple
+                vouchers, you can get statistics on how many of them have been redeemed etc.
+    :type tag: str
 
     Various constraints apply: