diff --git a/Jellyfin.Server.Implementations/Users/UserManager.cs b/Jellyfin.Server.Implementations/Users/UserManager.cs
index ffd0066ee3..bd853f92f7 100644
--- a/Jellyfin.Server.Implementations/Users/UserManager.cs
+++ b/Jellyfin.Server.Implementations/Users/UserManager.cs
@@ -1,3 +1,4 @@
+#nullable enable
 #pragma warning disable CA1307
 
 using System;