@@ -23,16 +23,16 @@
 /**
  * @class OFDNSQuery OFDNSQuery.h ObjFW/OFDNSQuery.h
  *
  * @brief A class representing a DNS query.
  */
+OF_SUBCLASSING_RESTRICTED
 @interface OFDNSQuery: OFObject <OFCopying>
 {
 	OFString *_domainName;
 	OFDNSClass _DNSClass;
 	OFDNSRecordType _recordType;
-	OF_RESERVE_IVARS(OFDNSQuery, 4)
 }
 
 /**
  * @brief The domain name of the query.
  */