@@ -27,10 +27,11 @@
  */
 @interface OFObserveFailedException: OFException
 {
 	OFKernelEventObserver *_observer;
 	int _errNo;
+	OF_RESERVE_IVARS(OFObserveFailedException, 4)
 }
 
 /**
  * @brief The observer which failed to observe.
  */