--- a/src/java.base/share/classes/java/util/AbstractMap.java	Thu Aug 29 18:52:30 2019 -0400
+++ b/src/java.base/share/classes/java/util/AbstractMap.java	Thu Aug 29 16:31:34 2019 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 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
@@ -604,6 +604,7 @@
     public static class SimpleEntry<K,V>
         implements Entry<K,V>, java.io.Serializable
     {
+        @java.io.Serial
         private static final long serialVersionUID = -8499721149061103585L;
 
         private final K key;
@@ -734,6 +735,7 @@
     public static class SimpleImmutableEntry<K,V>
         implements Entry<K,V>, java.io.Serializable
     {
+        @java.io.Serial
         private static final long serialVersionUID = 7138329143949025153L;
 
         private final K key;