@@ -24,11 +24,11 @@
  *
  * @brief A class for parsing URLs and accessing parts of it.
  */
 @interface OFMutableURL: OFURL
 {
-	OF_RESERVE_IVARS(4)
+	OF_RESERVE_IVARS(OFMutableURL, 4)
 }
 
 /*!
  * @brief The scheme part of the URL.
  */