--- old/src/share/classes/com/sun/security/auth/UserPrincipal.java	2013-02-21 17:46:48.944649317 +0000
+++ new/src/share/classes/com/sun/security/auth/UserPrincipal.java	2013-02-21 17:46:48.648649324 +0000
@@ -42,6 +42,7 @@
  *
  * @since 1.6
  */
+@jdk.Supported
 public final class UserPrincipal implements Principal, java.io.Serializable {
 
     private static final long serialVersionUID = 892106070870210969L;