Manager Alan Archibald expects Stephen O'Donnell to leave Partick Thistle in the summer and has no intention of selling the right-back this month.
"He's a free agent at the end of the season and there is every chance he will go then," said Archibald.
"With the teams who are showing interest, I don't think we would be able to match the wages on offer.
"But, at this stage, Stephen and young Dale Keenan are the only full-backs we've got on our books."
O'Donnell, 22, has been at Firhill since 2011 following his release from Celtic.
He has been linked with a move to join former Jags boss Jackie McNamara at Dundee United.
"I think there is a bit of interest from Dundee United and other clubs but I don't think Stephen will be leaving in this window," added Archibald.
"It's a left full-back we've been trying to get first and foremost."
Left-back Jordan McMillan has been suspended pending the outcome of an internal investigation, while Jake Carroll returned to Huddersfield following a loan spell.
And Archibald has so far been frustrated in his bid to recruit new signings.
"We tried to get one or two in on Monday and we thought we had them," he revealed. "But we've had a couple of knock-backs for different reasons.
"We thought we had a defender in and it fell down at the last minute and the player changed his mind.
"We're very reluctant to gamble and just grab anybody. We want to make sure that the player we bring in is better than what we've got."