diff --git a/beets/autotag/hooks.py b/beets/autotag/hooks.py
index e64b42513..a9a35e635 100644
--- a/beets/autotag/hooks.py
+++ b/beets/autotag/hooks.py
@@ -154,7 +154,8 @@ class TrackInfo(object):
                  length=None, index=None, medium=None, medium_index=None,
                  medium_total=None, artist_sort=None, disctitle=None,
                  artist_credit=None, data_source=None, data_url=None,
-                 media=None, lyricist=None, composer=None, arranger=None, alt_track_no=None):
+                 media=None, lyricist=None, composer=None, arranger=None, 
+                 alt_track_no=None):
         self.title = title
         self.track_id = track_id
         self.artist = artist