diff --git a/ui/widgets/mouse.js b/ui/widgets/mouse.js
index ef9dd8dbe9..3f9ace12d6 100644
--- a/ui/widgets/mouse.js
+++ b/ui/widgets/mouse.js
@@ -58,7 +58,7 @@ return $.widget( "ui.mouse", {
 				}
 			} );
 
-		this.started = false;
+		this._mouseStarted = false;
 	},
 
 	// TODO: make sure destroying one instance of mouse doesn't mess with