The defender could miss this week's Champions League clash with Stuttgart after failing to make himself available for Saturday's 3-0 victory against Kilmarnock.
- Football fixtures
- Rangers home
"I'll probably speak to him today (Monday) at some stage," said Smith. "It's obviously a concern but it's happened and we just have to handle it. We'll just get on with it.
"We aren't the first club it's happened to and we won't be the last. We've not selected the team yet and we'll sit down and do that after training."