@@ -28,10 +28,14 @@
     OFPair OF_GENERIC(FirstType, SecondType)
 #if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
 # define FirstType id
 # define SecondType id
 #endif
+{
+	OF_RESERVE_IVARS(4)
+}
+
 /*!
  * @brief The first object of the pair.
  */
 @property (readwrite, nonatomic, retain) FirstType firstObject;