diff --git a/osu.Game/Online/RealtimeMultiplayer/IMultiplayerServer.cs b/osu.Game/Online/RealtimeMultiplayer/IMultiplayerServer.cs
index 1bb6331c0a..836260a26d 100644
--- a/osu.Game/Online/RealtimeMultiplayer/IMultiplayerServer.cs
+++ b/osu.Game/Online/RealtimeMultiplayer/IMultiplayerServer.cs
@@ -1,3 +1,6 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
 using System.Threading.Tasks;
 
 namespace osu.Game.Online.RealtimeMultiplayer
diff --git a/osu.Game/Online/RealtimeMultiplayer/NotJoinedRoomException.cs b/osu.Game/Online/RealtimeMultiplayer/NotJoinedRoomException.cs
index ca4a54f6d7..d71200a086 100644
--- a/osu.Game/Online/RealtimeMultiplayer/NotJoinedRoomException.cs
+++ b/osu.Game/Online/RealtimeMultiplayer/NotJoinedRoomException.cs
@@ -1,3 +1,6 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
 using System;
 
 namespace osu.Game.Online.RealtimeMultiplayer