diff --git a/beets/mediafile.py b/beets/mediafile.py
index 941a2f8f1..111b4d73b 100644
--- a/beets/mediafile.py
+++ b/beets/mediafile.py
@@ -1649,6 +1649,7 @@ class MediaFile(object):
         StorageStyle('ARRANGER'),
         ASFStorageStyle('beets/Arranger'),
     )
+    
     grouping = MediaField(
         MP3StorageStyle('TIT1'),
         MP4StorageStyle('\xa9grp'),