(((i) == THREAD_QOS_UNSPECIFIED) ? QOS_CLASS_UNSPECIFIED : \
((i) == THREAD_QOS_USER_INTERACTIVE) ? QOS_CLASS_USER_INTERACTIVE : \
((i) == THREAD_QOS_USER_INITIATED) ? QOS_CLASS_USER_INITIATED : \
- ((i) == THREAD_QOS_LEGACY) ? QOS_CLASS_LEGACY : \
+ ((i) == THREAD_QOS_LEGACY) ? QOS_CLASS_DEFAULT : \
((i) == THREAD_QOS_UTILITY) ? QOS_CLASS_UTILITY : \
((i) == THREAD_QOS_BACKGROUND) ? QOS_CLASS_BACKGROUND : \
((i) == THREAD_QOS_MAINTENANCE) ? QOS_CLASS_MAINTENANCE : \