--- old/src/share/classes/sun/rmi/server/UnicastRef2.java	Tue Feb 21 21:26:53 2012
+++ new/src/share/classes/sun/rmi/server/UnicastRef2.java	Tue Feb 21 21:26:50 2012
@@ -36,6 +36,7 @@
  * implementation of javax.management.remote.rmi.RMIConnector.
  **/
 public class UnicastRef2 extends UnicastRef {
+    private static final long serialVersionUID = 1829537514995881838L;
 
     /**
      * Create a new (empty) Unicast remote reference.