@@ -23,10 +23,14 @@
  * @class OFValue OFValue.h ObjFW/OFValue.h
  *
  * @brief A class for storing arbitrary values in an object.
  */
 @interface OFValue: OFObject <OFCopying>
+{
+	OF_RESERVE_IVARS(4)
+}
+
 /*!
  * @brief The ObjC type encoding of the value.
  */
 @property (readonly, nonatomic) const char *objCType;