diff -r 8ea30d59ac41 -r 74cd21f2c2fe src/share/classes/com/sun/tools/doclets/formats/html/PackageTreeWriter.java
--- a/src/share/classes/com/sun/tools/doclets/formats/html/PackageTreeWriter.java	Tue May 14 10:14:51 2013 -0700
+++ b/src/share/classes/com/sun/tools/doclets/formats/html/PackageTreeWriter.java	Tue May 14 10:14:52 2013 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -115,7 +115,7 @@
     protected void generatePackageTreeFile() throws IOException {
         Content body = getPackageTreeHeader();
         Content headContent = getResource("doclet.Hierarchy_For_Package",
-                Util.getPackageName(packagedoc));
+                Util.escapeHtmlChars(Util.getPackageName(packagedoc)));
         Content heading = HtmlTree.HEADING(HtmlConstants.TITLE_HEADING, false,
                 HtmlStyle.title, headContent);
         Content div = HtmlTree.DIV(HtmlStyle.header, heading);