diff -r 6e017b301287 -r e036ee8bae56 src/java.base/share/classes/java/time/chrono/ChronoPeriodImpl.java
--- a/src/java.base/share/classes/java/time/chrono/ChronoPeriodImpl.java	Wed Oct 09 09:57:41 2019 -0700
+++ b/src/java.base/share/classes/java/time/chrono/ChronoPeriodImpl.java	Wed Oct 09 10:17:50 2019 -0700
@@ -109,6 +109,7 @@
     /**
      * The chronology.
      */
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     private final Chronology chrono;
     /**
      * The number of years.