--- a/test/jdk/java/io/Serializable/explicitCNFException/ExplicitCNFException.java	Fri Oct 11 09:43:41 2019 -0700
+++ b/test/jdk/java/io/Serializable/explicitCNFException/ExplicitCNFException.java	Fri Oct 11 13:11:56 2019 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 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
@@ -31,6 +31,8 @@
 import java.io.*;
 
 class A implements Serializable {
+    private static final long serialVersionUID = 1L;
+
     private void readObject(ObjectInputStream in)
         throws ClassNotFoundException, IOException
     {
@@ -39,6 +41,8 @@
 }
 
 class B implements Externalizable {
+    private static final long serialVersionUID = 1L;
+
     public B() {}
 
     public void writeExternal(ObjectOutput out) throws IOException {}