diff --git a/osu.Game/Screens/OsuScreen.cs b/osu.Game/Screens/OsuScreen.cs
index 3d8ead0fbb..de9c698f2a 100644
--- a/osu.Game/Screens/OsuScreen.cs
+++ b/osu.Game/Screens/OsuScreen.cs
@@ -136,6 +136,7 @@ protected override bool OnExiting(Screen next)
 
             // while this is not necessary as we are constructing our own bindable, there are cases where
             // the GC doesn't run as fast as expected and this is triggered post-exit.
+            // added to resolve https://github.com/ppy/osu/issues/829
             beatmap.ValueChanged -= OnBeatmapChanged;
 
             return false;