diff --git a/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs b/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs
index ad117451b..93ab88195 100644
--- a/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs
+++ b/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs
@@ -47,6 +47,7 @@ namespace NzbDrone.Core.Notifications.CustomScript
             environmentVariables.Add("Lidarr_Release_AlbumCount", remoteAlbum.Albums.Count.ToString());
             environmentVariables.Add("Lidarr_Release_AlbumReleaseDates", string.Join(",", remoteAlbum.Albums.Select(e => e.ReleaseDate)));
             environmentVariables.Add("Lidarr_Release_AlbumTitles", string.Join("|", remoteAlbum.Albums.Select(e => e.Title)));
+            environmentVariables.Add("Lidarr_Release_AlbumMBIds", string.Join("|", remoteAlbum.Albums.Select(e => e.ForeignAlbumId)));
             environmentVariables.Add("Lidarr_Release_Title", remoteAlbum.Release.Title);
             environmentVariables.Add("Lidarr_Release_Indexer", remoteAlbum.Release.Indexer ?? string.Empty);
             environmentVariables.Add("Lidarr_Release_Size", remoteAlbum.Release.Size.ToString());