diff --git a/osu.Game/Graphics/UserInterface/TriangleButton.cs b/osu.Game/Graphics/UserInterface/TriangleButton.cs
index 675e03aef8..61e9705064 100644
--- a/osu.Game/Graphics/UserInterface/TriangleButton.cs
+++ b/osu.Game/Graphics/UserInterface/TriangleButton.cs
@@ -15,6 +15,9 @@ using osu.Game.Graphics.Sprites;
 
 namespace osu.Game.Graphics.UserInterface
 {
+    /// <summary>
+    /// A button with moving triangles in the background.
+    /// </summary>
     public class TriangleButton : OsuButton, IFilterable
     {
         private Box hover;