It follows an injury to Ben Murphy.
Laois' Will Reilly has been called up the Irish U-20 squad for the Six Nations following an injury.
The Ballyfin man was one of four players to miss out on the original squad announced last week.
The former Portlaoise RFC man is now part of the Leinster Provincial Talent Squad and has previously earned caps at U-18 level.
Ireland begin their campaign with a game against Scotland in Cardiff, where all games are taking place.
Full list of fixtures:
Scotland v Ireland – Saturday June 19 at 2pm
Wales v Ireland – Friday June 25 at 8pm
Ireland v England – Thursday July 1 at 8pm
Italy v Ireland – Wednesday July 7 at 2pm
Ireland v France – Tuesday July 13 at 4.45pm