diff --git a/SparkleShare/SparkleBubble.cs b/SparkleShare/SparkleBubble.cs
index f2f8c554..b1b90dad 100644
--- a/SparkleShare/SparkleBubble.cs
+++ b/SparkleShare/SparkleBubble.cs
@@ -29,6 +29,8 @@ namespace SparkleShare {
 				AttachToStatusIcon (SparkleUI.NotificationIcon);
 		}
 
+		// Checks whether the system allows adding buttons to a notification,
+		// prevents error messages in Ubuntu.
 		new public void AddAction (string Action, string Label,
 		                           ActionHandler Handler) {