@@ -100,15 +100,15 @@
  *
  * It can also be used to build OFXMLElements from parts of the document by
  * first parsing stuff using the OFXMLParser with another delegate and then
  * setting the OFXMLElementBuilder as delegate for the parser.
  */
+OF_SUBCLASSING_RESTRICTED
 @interface OFXMLElementBuilder: OFObject <OFXMLParserDelegate>
 {
 	OFMutableArray OF_GENERIC(OFXMLElement *) *_stack;
 	id <OFXMLElementBuilderDelegate> _Nullable _delegate;
-	OF_RESERVE_IVARS(OFXMLElementBuilder, 4)
 }
 
 /**
  * @brief The delegate for the OFXMLElementBuilder.
  */