@@ -33,12 +33,12 @@
 /**
  * \param class_ The class of the object which caused the exception
  * \param hash The hash which has already been calculated
  * \return A new hash already calculated exception
  */
-+ exceptionWithClass: (Class)class_
-		hash: (OFHash*)hash;
++ (instancetype)exceptionWithClass: (Class)class_
+			      hash: (OFHash*)hash;
 
 /**
  * Initializes an already allocated hash already calculated exception.
  *
  * \param class_ The class of the object which caused the exception