Frank McAvennie, who starred for the Hoops over two spells in the 1980s and 90s, believes the current defence needs bolstered despite the Christopher Jullien returning to full training after a year out injured.
And he has backed Ange Postecoglou to bring in extra reinforcements ahead of the window closing.
"Strikers are great, I just think we’re a bit short at the back,” McAvennie told Football Insider.
“Jullien isn’t back from his injury yet and even when he’s back it will take a while for him to get back up to speed.
“If he’s going to be missing, I would like to see the club go out and bring in another centre-back.
“I think the manager is clever enough to know that’s what he needs so, yeah, I think that will happen soon.
“Take nothing away from Starfelt and Carter-Vickers, I thought they were both good against Hibs.
“But we are one injury away from the defence being a little bit shakey, in my opinion.”