--- a/src/java.base/share/classes/java/util/PriorityQueue.java	Wed Oct 09 09:57:41 2019 -0700
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java	Wed Oct 09 10:17:50 2019 -0700
@@ -111,6 +111,7 @@
      * The comparator, or null if priority queue uses elements'
      * natural ordering.
      */
+    @SuppressWarnings("serial") // Conditionally serializable
     private final Comparator<? super E> comparator;
 
     /**