--- old/src/java.base/share/classes/java/lang/NoClassDefFoundError.java	2019-08-27 17:27:27.206324386 -0700
+++ new/src/java.base/share/classes/java/lang/NoClassDefFoundError.java	2019-08-27 17:27:26.918324386 -0700
@@ -40,6 +40,7 @@
  */
 public
 class NoClassDefFoundError extends LinkageError {
+    @java.io.Serial
     private static final long serialVersionUID = 9095859863287012458L;
 
     /**