Riviere has missed the entirety of the season so far with a knee injury, but he is expected to be available for selection again in the near future.
The Frenchman is back in training, and it seems that his return to full fitness is not too far away.
“Manu Riviere is back in training, so it's like a new signing for us,” the former England boss said. “He’s buzzing around the training field, so that's a plus."
McClaren is clearly enthused by Riviere’s return, but Newcastle fans are not.
The 25-year-old’s stock could hardly be any lower at St. James’ Park, as he struggled so badly last season.
Riviere made 23 Premier League appearances during the 2014/15 campaign, but he only scored once - and rarely looked up to the standard required.
Newcastle fans are not optimistic that Riviere will prove to be the difference maker this time around either, and they certainly weren’t pleased with McClaren’s comments.
Here is the best reaction on social media site Twitter.
McClaren trolling out the "like a new signing" line, talking about Riviere - a man who hasn't been able to hit a barn door for #nufc. Great.— Sam Cook (@Funguslover) December 30, 2015
The last thing McCLaren should be doing is taking quotes out of Pardew’s playbook. “Like a new signing”. smh. #NUFC— Ben Fortune (@benfortune303) December 30, 2015
What #nufc need in the January window - a decent CB, LB and winger. What we'll get - "Riviere is like a new signing"...— Shiftz (@ShiftzTrapstyle) December 30, 2015
SMC described the return of Rivière, ST with 1 goal in 25+ appearances, as "like a new signing". Steve, you've just lost me with that #nufc— Nick Bird (@nickbird1982) December 30, 2015
I know McClaren is expected to put positive spin, but describing the return of Riviere to be "like a new signing" is really stretching it.— Richard Easterbrook (@MasonEcho) December 30, 2015
'Riviere will be like a new signing..I'm not worried that we're in the bottom three'. Alarm bells are starting to ring with McClaren. #NUFC— David O'Neill (@DavieONeill) December 30, 2015
Riviere is like a new signing. It'll take him half a season to find his feet.— Iain (@CrypticChedder) December 30, 2015