diff --git a/lib/client/polyfill.js b/lib/client/polyfill.js
index 535022d1..4a5951ee 100644
--- a/lib/client/polyfill.js
+++ b/lib/client/polyfill.js
@@ -47,6 +47,14 @@ var Util, DOM, jQuery;
             return fBound;
           };
     
+    if (!Array.isArray)
+        Array.isArray = function(arr) {
+            var type    = Util.getType(arr),
+                is      = type === 'array';
+            
+            return is;
+        };
+    
     /*
      * typeof callback === "function" should not be used,
      * as older browsers may report objects to be a function,