diff --git a/beetsplug/discogs.py b/beetsplug/discogs.py
index 7e398072b..cc2bd67ff 100644
--- a/beetsplug/discogs.py
+++ b/beetsplug/discogs.py
@@ -559,7 +559,7 @@ class DiscogsPlugin(BeetsPlugin):
         title = track['title']
         if self.config['index_tracks']:
             prefix = ', '.join(divisions)
-            title = ': '.join(prefix, title)
+            title = ': '.join([prefix, title])
         track_id = None
         medium, medium_index, _ = self.get_track_index(track['position'])
         artist, artist_id = MetadataSourcePlugin.get_artist(