src/java.base/share/classes/java/nio/file/ReadOnlyFileSystemException.java

*** 33,42 ****
--- 33,43 ----
   */
  
  public class ReadOnlyFileSystemException
      extends UnsupportedOperationException
  {
+     @java.io.Serial
      static final long serialVersionUID = -6822409595617487197L;
  
      /**
       * Constructs an instance of this class.
       */