diff --git a/lib/OpenLayers/BaseTypes.js b/lib/OpenLayers/BaseTypes.js
index d42ae9e962..64c58ec2e3 100644
--- a/lib/OpenLayers/BaseTypes.js
+++ b/lib/OpenLayers/BaseTypes.js
@@ -366,7 +366,7 @@ OpenLayers.Bounds.prototype = {
     */
     toBBOX:function(power) {
         var mult;
-        if (power) {
+        if (power != null) {
             mult = Math.pow(10,power);
         } else { 
             mult = Math.pow(10,6);