diff --git a/osu.Game/Configuration/SessionStatics.cs b/osu.Game/Configuration/SessionStatics.cs
index bdfb0217ad..d2069e4027 100644
--- a/osu.Game/Configuration/SessionStatics.cs
+++ b/osu.Game/Configuration/SessionStatics.cs
@@ -95,6 +95,9 @@ namespace osu.Game.Configuration
         /// </summary>
         DailyChallengeIntroPlayed,
 
+        /// <summary>
+        /// The activity for the current user to broadcast to other players.
+        /// </summary>
         UserOnlineActivity,
     }
 }