diff --git a/extensions/RatingExtension/RatingExtension.cs b/extensions/RatingExtension/RatingExtension.cs
index 572e3b9..a51dd5c 100644
--- a/extensions/RatingExtension/RatingExtension.cs
+++ b/extensions/RatingExtension/RatingExtension.cs
@@ -1,4 +1,8 @@
-using System;
+// This extension writes a rating to the filename of rated videos when mpv.net shuts down.
+
+// The input.conf defaults contain key bindings for this extension to set ratings.
+
+using System;
 using System.ComponentModel.Composition;
 using System.Collections.Generic;
 using System.IO;
@@ -58,4 +62,4 @@ namespace RatingExtension // the assembly name must end with 'Extension'
                 Msg.Show("Rating Extension", "This extension writes a rating to the filename of rated videos when mpv.net shuts down.\n\nThe input.conf defaults contain key bindings for this extension to set ratings.");
         }
     }
-}
\ No newline at end of file
+}