diff --git a/src/NzbDrone.Core/Movies/Collections/MovieCollection.cs b/src/NzbDrone.Core/Movies/Collections/MovieCollection.cs
index 9e8cd1d0d6..6353343aaf 100644
--- a/src/NzbDrone.Core/Movies/Collections/MovieCollection.cs
+++ b/src/NzbDrone.Core/Movies/Collections/MovieCollection.cs
@@ -9,6 +9,7 @@ public class MovieCollection : ModelBase
         public MovieCollection()
         {
             Images = new List<MediaCover.MediaCover>();
+            Tags = new HashSet<int>();
         }
 
         public string Title { get; set; }