diff --git a/osu.Game/Database/UserLookupCache.cs b/osu.Game/Database/UserLookupCache.cs
index 8a99e27708..49ea82a4fe 100644
--- a/osu.Game/Database/UserLookupCache.cs
+++ b/osu.Game/Database/UserLookupCache.cs
@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using JetBrains.Annotations;
 using osu.Framework.Allocation;
 using osu.Game.Online.API;
 using osu.Game.Online.API.Requests;
@@ -23,6 +24,7 @@ namespace osu.Game.Database
         /// <param name="userId">The user to lookup.</param>
         /// <param name="token">An optional cancellation token.</param>
         /// <returns>The populated user, or null if the user does not exist or the request could not be satisfied.</returns>
+        [ItemCanBeNull]
         public Task<User> GetUserAsync(int userId, CancellationToken token = default) => GetAsync(userId, token);
 
         protected override async Task<User> ComputeValueAsync(int lookup, CancellationToken token = default)