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

@@ -38,10 +38,11 @@
  * @author  unascribed
  * @since   1.1
  */
 public class InvalidClassException extends ObjectStreamException {
 
+    @java.io.Serial
     private static final long serialVersionUID = -4333316296251054416L;
 
     /**
      * Name of the invalid class.
      *