diff --git a/lib/OpenLayers/Control/OverviewMap.js b/lib/OpenLayers/Control/OverviewMap.js
index 29a11c6ca1..0c5b471b65 100644
--- a/lib/OpenLayers/Control/OverviewMap.js
+++ b/lib/OpenLayers/Control/OverviewMap.js
@@ -11,7 +11,7 @@
 OpenLayers.Control.OverviewMap = OpenLayers.Class.create();
 
 OpenLayers.Control.OverviewMap.prototype = 
-  OpenLayers.Util.extend( new OpenLayers.Control(), {
+  OpenLayers.Class.inherit( OpenLayers.Control, {
 
     /** For div.id
      * @type String */