src/java.base/share/classes/java/io/NotActiveException.java

*** 31,40 ****
--- 31,41 ----
   * @author  unascribed
   * @since   1.1
   */
  public class NotActiveException extends ObjectStreamException {
  
+     @java.io.Serial
      private static final long serialVersionUID = -3893467273049808895L;
  
      /**
       * Constructor to create a new NotActiveException with the reason given.
       *