diff --git a/lib/OpenLayers/Control/KeyboardDefaults.js b/lib/OpenLayers/Control/KeyboardDefaults.js
index a015a9ae16..f3505353f0 100644
--- a/lib/OpenLayers/Control/KeyboardDefaults.js
+++ b/lib/OpenLayers/Control/KeyboardDefaults.js
@@ -62,6 +62,7 @@ OpenLayers.Control.KeyboardDefaults = OpenLayers.Class(OpenLayers.Control, {
      * evt - {Event} 
      */
     defaultKeyPress: function (evt) {
+        var size;
         switch(evt.keyCode) {
             case OpenLayers.Event.KEY_LEFT:
                 this.map.pan(-this.slideFactor, 0);
@@ -77,19 +78,19 @@ OpenLayers.Control.KeyboardDefaults = OpenLayers.Class(OpenLayers.Control, {
                 break;
             
             case 33: // Page Up. Same in all browsers.
-                var size = this.map.getSize();
+                size = this.map.getSize();
                 this.map.pan(0, -0.75*size.h);
                 break;
             case 34: // Page Down. Same in all browsers.
-                var size = this.map.getSize();
+                size = this.map.getSize();
                 this.map.pan(0, 0.75*size.h);
                 break; 
             case 35: // End. Same in all browsers.
-                var size = this.map.getSize();
+                size = this.map.getSize();
                 this.map.pan(0.75*size.w, 0);
                 break; 
             case 36: // Home. Same in all browsers.
-                var size = this.map.getSize();
+                size = this.map.getSize();
                 this.map.pan(-0.75*size.w, 0);
                 break;