@@ -67,10 +67,14 @@
 @interface OFSet OF_GENERIC(ObjectType): OFObject <OFCollection, OFCopying,
     OFMutableCopying, OFSerialization>
 #if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
 # define ObjectType id
 #endif
+{
+	OF_RESERVE_IVARS(4)
+}
+
 /*!
  * @brief An array of all objects in the set.
  */
 @property (readonly, nonatomic) OFArray OF_GENERIC(ObjectType) *allObjects;