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

@@ -82,11 +82,13 @@
 
     /** serialPersistentFields value indicating no serializable fields */
     public static final ObjectStreamField[] NO_FIELDS =
         new ObjectStreamField[0];
 
+    @java.io.Serial
     private static final long serialVersionUID = -6120832682080437368L;
+    @java.io.Serial
     private static final ObjectStreamField[] serialPersistentFields =
         NO_FIELDS;
 
     /** reflection factory for obtaining serialization constructors */
     private static final ReflectionFactory reflFactory =