Mind Flay when used by PC doesn't yield EXP

I used EE Keeper to change my player character into an Illithid. However, it would seem that I went a good portion of the game before realizing that upon killing an enemy, no experience is yielded when mind flaying, as opposed to when the same character dispatches an enemy with, say, magic missile. Are there any tweaks I can do to gain experience from this form of attack?