@@ -820,10 +820,20 @@
  *	 but instead return the result of the superclass!
  *
  * @return The target to forward the message to
  */
 - (id)forwardingTargetForSelector: (SEL)selector;
+
+/*!
+ * @brief Handles messages which are not understood by the receiver.
+ *
+ * @warning If you override this method, you must make sure that it never
+ *	    returns.
+ *
+ * @param selector The selector not understood by the receiver
+ */
+- (void)doesNotRecognizeSelector: (SEL)selector;
 @end
 
 /*!
  * @brief A protocol for the creation of copies.
  */