Speaking on Sky Sports News, Charlie Nicholas criticised Arsenal's transfer philosophy and urged them to strengthen defensively.
The Gunners have already made one signing on Deadline Day, bringing in Denis Suarez on loan from Barcelona until the end of season.
However, speaking on Sky Sports News, Nicholas had some strong words for his former club, urging them to sign a defender.
"I'm happy with anybody now to be honest because this Arsenal transfer philosophy is an absolute joke", he told Sky Sports News. "It really is a joke and has been ever since David Dein left the building.
"I'm confused because we all need defenders and they are hard to get. Liverpool spent £60m to £70m getting one of the best you can get, and we can't seem to identify one.
"We're the ninth richest club and we can only get loan deals. I don't care if the manager likes this player or not, please Arsenal, get some defenders in!"