1 files changed, 2 insertions, 2 deletions
diff --git a/Emby.Server.Implementations/UserViews/FolderImageProvider.cs b/Emby.Server.Implementations/UserViews/FolderImageProvider.cs
index c810004ab..4655cd928 100644
--- a/Emby.Server.Implementations/UserViews/FolderImageProvider.cs
+++ b/Emby.Server.Implementations/UserViews/FolderImageProvider.cs
@@ -24,7 +24,7 @@ namespace Emby.Server.Implementations.UserViews
             _libraryManager = libraryManager;
         }
 
-        protected override List<BaseItem> GetItemsWithImages(BaseItem item)
+        protected override IReadOnlyList<BaseItem> GetItemsWithImages(BaseItem item)
         {
             return _libraryManager.GetItemList(new InternalItemsQuery
             {
@@ -40,7 +40,7 @@ namespace Emby.Server.Implementations.UserViews
             });
         }
 
-        protected override string CreateImage(BaseItem item, List<BaseItem> itemsWithImages, string outputPathWithoutExtension, ImageType imageType, int imageIndex)
+        protected override string CreateImage(BaseItem item, IReadOnlyCollection<BaseItem> itemsWithImages, string outputPathWithoutExtension, ImageType imageType, int imageIndex)
         {
             return CreateSingleImage(itemsWithImages, outputPathWithoutExtension, ImageType.Primary);
         }