diff --git a/lib/OpenLayers/Layer/Yahoo.js b/lib/OpenLayers/Layer/Yahoo.js
index b5850c71a8..c54de17988 100644
--- a/lib/OpenLayers/Layer/Yahoo.js
+++ b/lib/OpenLayers/Layer/Yahoo.js
@@ -26,9 +26,9 @@ OpenLayers.Layer.Yahoo = OpenLayers.Class(
     
     /** 
      * Constant: MAX_ZOOM_LEVEL
-     * {Integer} 15
+     * {Integer} 17
      */
-    MAX_ZOOM_LEVEL: 15,
+    MAX_ZOOM_LEVEL: 17,
 
     /** 
      * Constant: RESOLUTIONS
@@ -51,7 +51,9 @@ OpenLayers.Layer.Yahoo = OpenLayers.Class(
         0.00034332275390625, 
         0.000171661376953125, 
         0.0000858306884765625, 
-        0.00004291534423828125
+        0.00004291534423828125,
+        0.00002145767211914062,
+        0.00001072883605957031
     ],
 
     /**