--- old/src/java.desktop/share/classes/java/awt/desktop/FilesEvent.java	2019-09-21 12:30:18.675000000 -0700
+++ new/src/java.desktop/share/classes/java/awt/desktop/FilesEvent.java	2019-09-21 12:30:18.471000000 -0700
@@ -47,6 +47,7 @@
     /**
      * The list of files.
      */
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     final List<File> files;
 
     /**