1 files changed, 1 insertions, 3 deletions
diff --git a/MediaBrowser.Controller/Channels/IHasCacheKey.cs b/MediaBrowser.Controller/Channels/IHasCacheKey.cs
index 9fae43033..7d5207c34 100644
--- a/MediaBrowser.Controller/Channels/IHasCacheKey.cs
+++ b/MediaBrowser.Controller/Channels/IHasCacheKey.cs
@@ -1,5 +1,3 @@
-#nullable disable
-
 #pragma warning disable CS1591
 
 namespace MediaBrowser.Controller.Channels
@@ -11,6 +9,6 @@ namespace MediaBrowser.Controller.Channels
         /// </summary>
         /// <param name="userId">The user identifier.</param>
         /// <returns>System.String.</returns>
-        string GetCacheKey(string userId);
+        string? GetCacheKey(string? userId);
     }
 }