--- old/src/java.management/share/classes/javax/management/loading/PrivateMLet.java	2019-10-16 19:12:41.253961838 -0700
+++ new/src/java.management/share/classes/javax/management/loading/PrivateMLet.java	2019-10-16 19:12:41.045961838 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2007, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2019, 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
@@ -38,6 +38,7 @@
  *
  * @since 1.5
  */
+@SuppressWarnings("serial") // Externalizable class w/o no-arg c'tor
 public class PrivateMLet extends MLet implements PrivateClassLoader {
     private static final long serialVersionUID = 2503458973393711979L;