src/java.base/share/classes/java/io/FileNotFoundException.java

@@ -39,10 +39,11 @@
  * @author  unascribed
  * @since   1.0
  */
 
 public class FileNotFoundException extends IOException {
+    @java.io.Serial
     private static final long serialVersionUID = -897856973823710492L;
 
     /**
      * Constructs a <code>FileNotFoundException</code> with
      * <code>null</code> as its error detail message.