diff --git a/beetsplug/discogs.py b/beetsplug/discogs.py
index 915333ff7..b1b1593cd 100644
--- a/beetsplug/discogs.py
+++ b/beetsplug/discogs.py
@@ -563,8 +563,8 @@ class DiscogsPlugin(BeetsPlugin):
         title = track['title']
         if self.config['index_tracks']:
             prefix = ', '.join(divisions)
-            if prefix != '':
-                title = ': '.join([prefix, title])
+            if prefix:
+                title = '{}: {}'.format(prefix, title)
         track_id = None
         medium, medium_index, _ = self.get_track_index(track['position'])
         artist, artist_id = MetadataSourcePlugin.get_artist(