--- old/src/java.base/share/classes/java/io/SyncFailedException.java	2019-08-27 17:26:56.926324386 -0700
+++ new/src/java.base/share/classes/java/io/SyncFailedException.java	2019-08-27 17:26:56.726324386 -0700
@@ -34,6 +34,7 @@
  * @since   1.1
  */
 public class SyncFailedException extends IOException {
+    @java.io.Serial
     private static final long serialVersionUID = -2353342684412443330L;
 
     /**