diff --git a/lib/OpenLayers/Control/NavToolbar.js b/lib/OpenLayers/Control/NavToolbar.js
index d6e2870c39..d0a8bf1fd9 100644
--- a/lib/OpenLayers/Control/NavToolbar.js
+++ b/lib/OpenLayers/Control/NavToolbar.js
@@ -16,9 +16,13 @@ OpenLayers.Control.NavToolbar.prototype =
     /**
      * Constructor: OpenLayers.Control.NavToolbar 
      * Add our two mousedefaults controls.
+     *
+     * Parameters:
+     * options - {Object} An optional object whose properties will be used
+     *     to extend the control.
      */
     initialize: function(options) {
-        OpenLayers.Control.Panel.prototype.initialize.apply(this, arguments);
+        OpenLayers.Control.Panel.prototype.initialize.apply(this, [options]);
         this.addControls([
           new OpenLayers.Control.Navigation(),
           new OpenLayers.Control.ZoomBox()
@@ -36,4 +40,4 @@ OpenLayers.Control.NavToolbar.prototype =
     },
 
     CLASS_NAME: "OpenLayers.Control.NavToolbar"
-});    
+});
diff --git a/lib/OpenLayers/Control/Panel.js b/lib/OpenLayers/Control/Panel.js
index e54695a603..b3ce1cc301 100644
--- a/lib/OpenLayers/Control/Panel.js
+++ b/lib/OpenLayers/Control/Panel.js
@@ -30,11 +30,11 @@ OpenLayers.Control.Panel.prototype =
      * Constructor: OpenLayers.Control 
      * 
      * Parameters:
-     * element - {DOMElement} 
-     * base - {String} 
+     * options - {Object} An optional object whose properties will be used
+     *     to extend the control.
      */
-    initialize: function(element) {
-        OpenLayers.Control.prototype.initialize.apply(this, arguments);
+    initialize: function(options) {
+        OpenLayers.Control.prototype.initialize.apply(this, [options]);
         this.controls = [];
     },