src/java.base/share/classes/java/lang/ClassCircularityError.java

@@ -31,10 +31,11 @@
  *
  * @author     unascribed
  * @since      1.0
  */
 public class ClassCircularityError extends LinkageError {
+    @java.io.Serial
     private static final long serialVersionUID = 1054362542914539689L;
 
     /**
      * Constructs a {@code ClassCircularityError} with no detail message.
      */