The Belgian was in fine form as City swept aside second placed Leicester City in their key clash at the weekend.
City went behind, but rallied to claim a 3-1 win to keep up the pace for a second place finish this season.
Mahrez was asked about his thoughts on De Bruyne after the game.
"He is very good," the winger told reporters.
"He has a lot of quality so he helps us a lot. It's great to have a player like him in the team.
"Every game he contributes to the team, so I'm happy to have him with us."