diff --git a/lib/music_brainz/release.ex b/lib/music_brainz/release.ex
index b40b0f66..9863479c 100644
--- a/lib/music_brainz/release.ex
+++ b/lib/music_brainz/release.ex
@@ -121,7 +121,7 @@ defmodule MusicBrainz.Release do
   end
 
   defp parse_catalog_number(label_infos) do
-    Enum.find_value(label_infos, fn li ->
+    Enum.map_join(label_infos, ", ", fn li ->
       li["catalog-number"]
     end)
   end