--- old/src/java.base/share/classes/java/lang/ref/FinalReference.java	2017-02-24 17:13:32.000000000 -0800
+++ new/src/java.base/share/classes/java/lang/ref/FinalReference.java	2017-02-24 17:13:32.000000000 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2017, 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
@@ -33,4 +33,9 @@
     public FinalReference(T referent, ReferenceQueue<? super T> q) {
         super(referent, q);
     }
+
+    @Override
+    public boolean enqueue() {
+        throw new UnsupportedOperationException("should never reach here");
+    }
 }