src/java.base/share/classes/java/net/SocketException.java

@@ -33,10 +33,11 @@
  * @author  Jonathan Payne
  * @since   1.0
  */
 public
 class SocketException extends IOException {
+    @java.io.Serial
     private static final long serialVersionUID = -5935874303556886934L;
 
     /**
      * Constructs a new {@code SocketException} with the
      * specified detail message.