@@ -29,10 +29,14 @@
  */
 @interface OFMutableSet OF_GENERIC(ObjectType): OFSet OF_GENERIC(ObjectType)
 #if !defined(OF_HAVE_GENERICS) && !defined(DOXYGEN)
 # define ObjectType id
 #endif
+{
+	OF_RESERVE_IVARS(4)
+}
+
 /*!
  * @brief Creates a new OFMutableSet with enough memory to hold the specified
  *	  number of objects.
  *
  * @param capacity The initial capacity for the OFMutableSet