src/java.base/share/classes/java/time/MonthDay.java

@@ -123,10 +123,11 @@
   * This class is immutable and thread-safe.
   *
   * @since 1.8
   */
  @jdk.internal.ValueBased
+ @jdk.internal.MigratedValueClass
  public final class MonthDay
          implements TemporalAccessor, TemporalAdjuster, Comparable<MonthDay>, Serializable {
  
      /**
       * Serialization version.