@@ -33,12 +33,12 @@
 /**
  * \param class_ The class of the object which caused the exception
  * \param thread The thread which could not be started
  * \return An initialized thread start failed exception
  */
-+ exceptionWithClass: (Class)class_
-	      thread: (OFThread*)thread;
++ (instancetype)exceptionWithClass: (Class)class_
+			    thread: (OFThread*)thread;
 
 /**
  * Initializes an already allocated thread start failed exception.
  *
  * \param class_ The class of the object which caused the exception