--- old/src/java.base/share/classes/java/io/ObjectStreamException.java	2019-08-27 17:26:54.510324386 -0700
+++ new/src/java.base/share/classes/java/io/ObjectStreamException.java	2019-08-27 17:26:54.286324386 -0700
@@ -33,6 +33,7 @@
  */
 public abstract class ObjectStreamException extends IOException {
 
+    @java.io.Serial
     private static final long serialVersionUID = 7260898174833392607L;
 
     /**