--- a/src/java.base/share/classes/sun/net/www/protocol/http/NegotiateAuthentication.java	Thu Oct 17 20:27:44 2019 +0100
+++ b/src/java.base/share/classes/sun/net/www/protocol/http/NegotiateAuthentication.java	Thu Oct 17 20:53:35 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 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
@@ -45,9 +45,11 @@
 
 class NegotiateAuthentication extends AuthenticationInfo {
 
+    @java.io.Serial
     private static final long serialVersionUID = 100L;
     private static final PlatformLogger logger = HttpURLConnection.getHttpLogger();
 
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     private final HttpCallerInfo hci;
 
     // These maps are used to manage the GSS availability for diffrent
@@ -66,6 +68,7 @@
     }
 
     // The HTTP Negotiate Helper
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     private Negotiator negotiator = null;
 
    /**