diff --git a/src/dom.js b/src/dom.js
index 8c82900..ce87673 100644
--- a/src/dom.js
+++ b/src/dom.js
@@ -1176,12 +1176,11 @@ Element.addMethods = function(methods) {
 
 document.viewport = {
   getDimensions: function() {
-    var dimensions = { };
-    var B = Prototype.Browser;
+    var dimensions = { }, B = Prototype.Browser;
     $w('width height').each(function(d) {
       var D = d.capitalize();
       dimensions[d] = (B.WebKit && !document.evaluate) ? self['inner' + D] :
-        (B.Opera) ? document.body['client' + D] : document.documentElement['client' + D];
+        (B.Opera && opera.version() < 9.5) ? document.body['client' + D] : document.documentElement['client' + D];
     });
     return dimensions;
   },