diff --git a/lib/util.js b/lib/util.js
index ba551c2e..76ddc797 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -142,6 +142,8 @@
                     error   = new Error(msg);
                     throw(error);
                 }
+            
+            return this;
         };
         
         /**