Rangers boss Stuart McCall says he feels sorry for Gael Bigirimana, but admits he should never have been signed.
Chris Gunter will stay at Reading, after the club took up the option to extend his deal by another year.
Watford striker Chris Iwelumo has joined Oldham on loan until the end of the season.
The 34-year-old joined Watford in 2011 and scored five goals in 47 appearances before playing five times for Notts County on loan earlier on this campaign.
Iwelumo has four Scotland caps to his name and counts Stoke, Colchester, Charlton, Wolves and Burnley as former clubs.