--- old/src/share/classes/sun/rmi/server/UnicastRef.java	Tue Feb 21 21:26:47 2012
+++ new/src/share/classes/sun/rmi/server/UnicastRef.java	Tue Feb 21 21:26:45 2012
@@ -65,6 +65,7 @@
         Log.getLog("sun.rmi.client.call", "RMI",
                    AccessController.doPrivileged(
                        new GetBooleanAction("sun.rmi.client.logCalls")));
+    private static final long serialVersionUID = 8258372400816541186L;
 
     protected LiveRef ref;