diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/misc/enumerate-undefined.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/misc/enumerate-undefined.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 547087;
+var summary = 'JS_EnumerateStandardClasses uses wrong attributes for undefined';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+for (var p in this);
+
+assertEq(Object.getOwnPropertyDescriptor(this, "undefined").writable, false);
+
+/******************************************************************************/
+
+reportCompare(true, true);
+
+print("All tests passed!");