@@ -25,11 +25,11 @@
  *
  * @brief A class which represents a mutable entry of a tar archive.
  */
 @interface OFMutableTarArchiveEntry: OFTarArchiveEntry
 {
-	OF_RESERVE_IVARS(4)
+	OF_RESERVE_IVARS(OFMutableTarArchiveEntry, 4)
 }
 
 /*!
  * @brief The file name of the entry.
  */