--- old/src/java.base/share/classes/java/lang/EnumConstantNotPresentException.java	2019-08-27 17:27:10.094324386 -0700
+++ new/src/java.base/share/classes/java/lang/EnumConstantNotPresentException.java	2019-08-27 17:27:09.818324386 -0700
@@ -38,6 +38,7 @@
  */
 @SuppressWarnings("rawtypes") /* rawtypes are part of the public api */
 public class EnumConstantNotPresentException extends RuntimeException {
+    @java.io.Serial
     private static final long serialVersionUID = -6046998521960521108L;
 
     /**