masters qual. requirement not reflected in hit create

[Brian Yin]

Hi all,

I want to require workers to have the MTurk Masters Qualification, and so I changed the relevant line in config.txt to require_master_workers = true

But when I create a hit the fee doesn't reflect the qualification requirement:

[psiTurk server:on mode:sdbx #HITs:1]$ hit create
number of participants? 24
reward per HIT? 6.00
duration of hit (in hours, it can be decimals)? 1
*****************************
    Max workers: 24
    Reward: $6.00
    Duration: 1.0 hours
    Fee: $57.60
    ________________________
    Total: $201.60
Create sandbox HIT [y/n]? n
*** Cancelling HIT creation.

Namely, the fee is currently 40% (base 20% MTurk fee + additional 20% because >10 workers) of the total worker rewards, but it should be 45% (+ 5% additional masters qual fee). Do I need to do something in addition to changing that line in config.txt? 

Thanks,

Brian