--- old/src/java.base/share/classes/java/time/temporal/UnsupportedTemporalTypeException.java	2019-08-27 17:28:45.070324386 -0700
+++ new/src/java.base/share/classes/java/time/temporal/UnsupportedTemporalTypeException.java	2019-08-27 17:28:44.862324386 -0700
@@ -77,6 +77,7 @@
     /**
      * Serialization version.
      */
+    @java.io.Serial
     private static final long serialVersionUID = -6158898438688206006L;
 
     /**