diff --git a/lib/client/dom.js b/lib/client/dom.js
index 014e049f..41087320 100644
--- a/lib/client/dom.js
+++ b/lib/client/dom.js
@@ -418,7 +418,7 @@ var CloudCmd, Util, DOM, CloudFunc, Dialog;
                             DOM.RESTful.write(path, file, callback);
                     };
                 
-                Util.checkArgs(files);
+                Util.checkArgs(arguments, ['files']);
                 
                 if (files.length) {
                     Util.forEach(files, function(file) {