diff --git a/osu.Game/Screens/Select/Carousel/DrawableCarouselBeatmapSet.cs b/osu.Game/Screens/Select/Carousel/DrawableCarouselBeatmapSet.cs
index b70278c9bb..369db37e63 100644
--- a/osu.Game/Screens/Select/Carousel/DrawableCarouselBeatmapSet.cs
+++ b/osu.Game/Screens/Select/Carousel/DrawableCarouselBeatmapSet.cs
@@ -213,6 +213,7 @@ namespace osu.Game.Screens.Select.Carousel
 
             LoadComponentsAsync(new CompositeDrawable[]
             {
+                // Choice of background image matches BSS implementation (always uses the lowest `beatmap_id` from the set).
                 new SetPanelBackground(manager.GetWorkingBeatmap(beatmapSet.Beatmaps.MinBy(b => b.OnlineID)))
                 {
                     RelativeSizeAxes = Axes.Both,