@@ -20,14 +20,14 @@
 /**
  * @class OFXMLCharacters OFXMLCharacters.h ObjFW/OFXMLCharacters.h
  *
  * @brief A class representing XML characters.
  */
+OF_SUBCLASSING_RESTRICTED
 @interface OFXMLCharacters: OFXMLNode
 {
 	OFString *_characters;
-	OF_RESERVE_IVARS(OFXMLCharacters, 4)
 }
 
 /**
  * @brief Creates a new OFXMLCharacters with the specified string.
  *