diff --git a/osu.Game/Beatmaps/BeatmapSetInfo.cs b/osu.Game/Beatmaps/BeatmapSetInfo.cs
index 6ed617898f..79cc8b70fb 100644
--- a/osu.Game/Beatmaps/BeatmapSetInfo.cs
+++ b/osu.Game/Beatmaps/BeatmapSetInfo.cs
@@ -35,6 +35,7 @@ namespace osu.Game.Beatmaps
         [NotNull]
         public List<BeatmapSetFileInfo> Files { get; set; } = new List<BeatmapSetFileInfo>();
 
+        // This field is temporary and only used by `APIBeatmapSet.ToBeatmapSet` (soon to be removed) and tests (to be updated to provide APIBeatmapSet instead).
         [NotMapped]
         public APIBeatmapSet OnlineInfo { get; set; }