diff --git a/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs b/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs
index 9610ef324..c657f8b16 100644
--- a/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs
+++ b/src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs
@@ -347,7 +347,7 @@ namespace NzbDrone.Core.Notifications.CustomScript
         {
             if (artist == null)
             {
-                return null;
+                return new List<string>();
             }
 
             return _tagRepository.GetTags(artist.Tags)