diff --git a/MediaBrowser.Api/UserLibrary/ItemsService.cs b/MediaBrowser.Api/UserLibrary/ItemsService.cs
index c605cd3962..a1e976bed8 100644
--- a/MediaBrowser.Api/UserLibrary/ItemsService.cs
+++ b/MediaBrowser.Api/UserLibrary/ItemsService.cs
@@ -228,7 +228,9 @@ namespace MediaBrowser.Api.UserLibrary
             var collectionFolders = _libraryManager.GetCollectionFolders(item);
             foreach (var collectionFolder in collectionFolders)
             {
-                if (user.Policy.EnabledFolders.Contains(collectionFolder.Id.ToString("N"), StringComparer.OrdinalIgnoreCase))
+                if (user.Policy.EnabledFolders.Contains(
+                    collectionFolder.Id.ToString("N", CultureInfo.InvariantCulture),
+                    StringComparer.OrdinalIgnoreCase))
                 {
                     isInEnabledFolder = true;
                 }