@@ -127,10 +127,11 @@
  * @brief An event-based XML parser.
  *
  * OFXMLParser is an event-based XML parser which calls the delegate's callbacks
  * as soon as it finds something, thus suitable for streams as well.
  */
+OF_SUBCLASSING_RESTRICTED
 @interface OFXMLParser: OFObject
 {
 	id <OFXMLParserDelegate> _Nullable _delegate;
 	enum of_xml_parser_state {
 		OF_XMLPARSER_IN_BYTE_ORDER_MARK,