src/java.base/share/classes/javax/net/ssl/HandshakeCompletedEvent.java

*** 47,56 ****
--- 47,57 ----
   * @since 1.4
   * @author David Brownell
   */
  public class HandshakeCompletedEvent extends EventObject
  {
+     @java.io.Serial
      private static final long serialVersionUID = 7914963744257769778L;
  
      private transient SSLSession session;
  
      /**