diff --git a/mopidy/core/playback.py b/mopidy/core/playback.py
index 208f0619..240c4454 100644
--- a/mopidy/core/playback.py
+++ b/mopidy/core/playback.py
@@ -361,6 +361,7 @@ class PlaybackController(object):
         current = self._pending_tl_track or self._current_tl_track
         pending = tl_track or current or self.core.tracklist.next_track(None)
         # avoid endless loop if 'repeat' is 'true' and no track is playable
+        # TODO: could miss a playable track in a shuffled playlist
         count = self.core.tracklist.get_length()
 
         while pending: