diff --git a/osu.Game/Modes/Objects/Types/IHasSpecial.cs b/osu.Game/Modes/Objects/Types/IHasSpecial.cs
index 5e8eabf705..5909f47301 100644
--- a/osu.Game/Modes/Objects/Types/IHasSpecial.cs
+++ b/osu.Game/Modes/Objects/Types/IHasSpecial.cs
@@ -3,6 +3,9 @@
 
 namespace osu.Game.Modes.Objects.Types
 {
+    /// <summary>
+    /// A special type of HitObject, mostly used for legacy conversion of "holds".
+    /// </summary>
     public interface IHasSpecial
     {
     }