NET
17 For if I do this voluntarily, I have a reward. But if I do it unwillingly, I am entrusted with a responsibility.
Darby
17 For if I do this voluntarily, I have a reward; but if not of my own will, I am entrusted with an administration.
KJV
17 For if I do this thing willingly, I have a reward: but if against my will, a dispensation [of the gospel] is committed unto me.