diff --git a/mopidy/mpd/translator.py b/mopidy/mpd/translator.py
index a76d6d59..d47c3703 100644
--- a/mopidy/mpd/translator.py
+++ b/mopidy/mpd/translator.py
@@ -108,7 +108,7 @@ def track_to_mpd_format(track, position=None, stream_title=None):
     if track.album and track.album.uri:
         result.append(('X-AlbumUri', track.album.uri))
     if track.album and track.album.images:
-        images = ';'.join(i for i in track.album.images if i is not '')
+        images = ';'.join(i for i in track.album.images if i != '')
         result.append(('X-AlbumImage', images))
 
     result = [element for element in result if _has_value(*element)]