--- old/src/java.base/share/classes/java/io/InvalidClassException.java	2019-08-27 17:26:51.322324386 -0700
+++ new/src/java.base/share/classes/java/io/InvalidClassException.java	2019-08-27 17:26:51.106324386 -0700
@@ -40,6 +40,7 @@
  */
 public class InvalidClassException extends ObjectStreamException {
 
+    @java.io.Serial
     private static final long serialVersionUID = -4333316296251054416L;
 
     /**