diff --git a/mozilla/js/tests/e4x/Regress/regress-264369.js b/mozilla/js/tests/e4x/Regress/regress-264369.js
new file mode 100644
index 00000000000..e7c59e8ee93
--- /dev/null
+++ b/mozilla/js/tests/e4x/Regress/regress-264369.js
@@ -0,0 +1,46 @@
+/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is Rhino code, released
+ * May 6, 1999.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1997-2000 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s):
+ * Igor Bukanov
+ * John Schneider
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU Public License (the "GPL"), in which case the
+ * provisions of the GPL are applicable instead of those above.
+ * If you wish to allow use of your version of this file only
+ * under the terms of the GPL and not to allow others to use your
+ * version of this file under the NPL, indicate your decision by
+ * deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL.  If you do not delete
+ * the provisions above, a recipient may use your version of this
+ * file under either the NPL or the GPL.
+ */
+
+START("toXMLString() should escape '>'");
+BUG(264369);
+
+var x = <a/>;
+var chars = "<>&";
+x.b = chars;
+
+TEST(1, "<b>&lt;&gt;&amp;</b>", x.b.toXMLString());
+
+END();
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