The Ulster lock is set to return from injury during the Six Nations.
Paul O'Connell says the key to unlocking Ian Henderson's full potential is staying injury free.
The 6ft 4inch lock is in line to return to the Irish pack alongside James Ryan during the Six Nations.
Henderson has previously come in for criticism from pundits and fans for perceived inconsistency in his performances.
But O'Connell says he's been impressed with the Ulsterman since he joined camp: