src/java.base/share/classes/java/time/chrono/Ser.java

*** 108,117 ****
--- 108,118 ----
      static final byte CHRONO_PERIOD_TYPE = 9;
  
      /** The type being serialized. */
      private byte type;
      /** The object being serialized. */
+     @SuppressWarnings("serial") // Not statically typed as Serializable
      private Object object;
  
      /**
       * Constructor for deserialization.
       */