diff --git a/lib/util.js b/lib/util.js
index aa930834..6fed1963 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -699,7 +699,7 @@
             
             exec.with           =  function(callback) {
                 var result,
-                    bind        = Function.prototype.bind;
+                    bind        = Function.bind;
                 
                 arguments[0]    = null;
                 result          = bind.apply(callback, arguments);