@@ -28,10 +28,11 @@
 {
 	OFSeekableStream *_stream;
 	OFStreamOffset _offset;
 	OFSeekWhence _whence;
 	int _errNo;
+	OF_RESERVE_IVARS(OFSeekFailedException, 4)
 }
 
 /**
  * @brief The stream for which seeking failed.
  */