Alfie Wylie’s side face Group 3 leaders Iceland in Reykjavik on Saturday September 15th, before returning to Belfast for a game against Belgium four days later.
Northern Ireland are unable to qualify for next summer’s finals in Sweden following a 2-0 defeat to Norway last time out.
Krystal, who is yet to concede a goal for Rovers this season, will be hoping to pick up her sixth cap for her country.