diff --git a/source/Ox/js/Type.js b/source/Ox/js/Type.js
index 1f44fa91..caa785a5 100644
--- a/source/Ox/js/Type.js
+++ b/source/Ox/js/Type.js
@@ -338,12 +338,18 @@ Ox.typeOf = function(value) {
     return Object.prototype.toString.call(value).slice(8, -1).toLowerCase();
 };
 (function() {
-    // Internet Explorer returns 'HTMLCollection' instead of 'NodeList',
+    // Firefox 3.6 returns 'Object' instead of 'Arguments',
+    // Internet Explorer 9 returns 'HTMLCollection' instead of 'NodeList',
     // Mobile Safari doesn't like null and undefined
     var nodelist = Ox.typeOf(document.getElementsByTagName('a'));
-    if (nodelist != 'nodelist' || Ox.typeOf() != 'undefined') {
+    if (
+        Ox.typeOf(arguments) != 'arguments'
+        && nodelist != 'nodelist'
+        || Ox.typeOf() != 'undefined'
+    ) {
         Ox.typeOf = function(value) {
-            var type = value === null ? 'null'
+            var type = value && Ox.hasOwn(value, 'callee') ? 'arguments'
+                : value === null ? 'null'
                 : value === void 0 ? 'undefined'
                 : Object.prototype.toString.call(
                     value