diff --git a/Iceshrimp.Frontend/Core/ControllerModels/UserControllerModel.cs b/Iceshrimp.Frontend/Core/ControllerModels/UserControllerModel.cs
index e203555a..a6bc40da 100644
--- a/Iceshrimp.Frontend/Core/ControllerModels/UserControllerModel.cs
+++ b/Iceshrimp.Frontend/Core/ControllerModels/UserControllerModel.cs
@@ -20,8 +20,8 @@ internal class UserControllerModel(ApiClient api)
 	public Task<UserResponse?> LookupUser(string username, string? host)
 	{
 		var query = new QueryString();
-		query.Add("username", username);
-		if (host != null) query.Add("host", host);
+		query = query.Add("username", username);
+		if (host != null) query = query.Add("host", host);
 		return api.CallNullable<UserResponse>(HttpMethod.Get, "/users/lookup", query);
 	}
 }
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