--- a/src/java.base/share/classes/sun/security/provider/SubjectCodeSource.java	Thu Oct 17 20:27:44 2019 +0100
+++ b/src/java.base/share/classes/sun/security/provider/SubjectCodeSource.java	Thu Oct 17 20:53:35 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 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
@@ -46,6 +46,7 @@
  */
 class SubjectCodeSource extends CodeSource implements java.io.Serializable {
 
+    @java.io.Serial
     private static final long serialVersionUID = 6039418085604715275L;
 
     private Subject subject;
@@ -53,6 +54,7 @@
     private static final Class<?>[] PARAMS = { String.class };
     private static final sun.security.util.Debug debug =
         sun.security.util.Debug.getInstance("auth", "\t[Auth Access]");
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     private ClassLoader sysClassLoader;
 
     /**