France coach Didier Deschamps has snubbed Benzema since before the 2016 Euros.
But Pires insists it's time for the exclusion to end, declaring to Radio Marca: "For me, Benzema is one of the best attackers.
"Now, what's going on with Deschamps, I cannot explain it. He deserves to be back in the squad, but I'm not the coach."
Deschamps has been adamant Benzema is not worthy of a place in his squad ahead of the World Cup.