Celtic first-team coach Alan Thompson is not expecting the club to bring in any new faces before the transfer window closes.
It had been thought The Bhoys could step up their search for defensive reinforcements following Daniel Majstorovic's injury.
Celtic boss Neil Lennon had been mulling over the possibility of bringing in Kelvin Wilson sooner and Thompson does not believe anything will be done before Wednesday's clash with high-flying Hearts.
The Celtic coach doubts whether the club will be in a position to unveil additions to the Parkhead squad before the January transfer window closes on Monday.
"I would think in terms of anyone coming in before the game, it is highly unlikely," explained Thompson.
"There are a number of things we are looking at between now and next Monday so we will just have to see what comes from that but at present it is looking like we will have to go with what we have.
"It's Forest's prerogative, he is their player although he has signed a pre-contract. We would like to get him in but as I said, there is nothing moving at present.
"You can understand their situation, he is their players and they will probably want to keep him until the summer."
Thomas Rogne is the only one of Celtic's central defenders who is currently fit, although he is backing his team-mates to help plug the gap in Majstorovic's absence.
"I am probably the only true central defender left but we have boys who can step in and do a job," he said.
"I don't know who is playing beside me yet but Charlie did a good job in the last game and Willo (Wilson) can play centre-half.
"So we will be fine - it's not a crisis. It's a strange situation of course but these things happen with injuries and everything and you just have to deal with it.
"There is always a responsibility when you play and maybe a bit extra now that I'm the only centre-half but that's something I am looking forward to."