--- a/src/java.base/share/classes/javax/security/auth/callback/UnsupportedCallbackException.java	Wed Oct 09 17:38:58 2019 +0100
+++ b/src/java.base/share/classes/javax/security/auth/callback/UnsupportedCallbackException.java	Wed Oct 09 09:57:41 2019 -0700
@@ -39,6 +39,7 @@
     /**
      * @serial
      */
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     private Callback callback;
 
     /**