The Northern Ireland midfielder is likely to be out for the remainder of the season after being carried off during the 2-1 home defeat to Annan Athletic last weekend.
Striker Andy Little could also miss the trip north with a knee injury but midfielder David Templeton may return to action following an Achilles problem.
Defenders Ross Perry and Darren Cole, midfielder Lewis Macleod and forward Kevin Kyle remain on the sidelines.
Rangers won 6-2 on their last visit to Elgin in December - a game which was originally postponed on safety grounds after the Moray club sold too many tickets.
However, the Black and Whites, who are sixth in the table, then earned a 1-1 draw at Ibrox in January - a big improvement on their 5-1 defeat in September.