Wilmots was unhappy with the Chelsea midfielder's work rate without the ball during Friday's win against Serbia.
"I spoke to Eden after the game," Wilmots said. "On Friday I had to move him away from the centre and put him out on the flank to restore the balance in the centre with Nacer Chadli, Mousa Dembele and Axel Witsel.
"Eden should know that, in football today, changing from defence to attack and from attack to defence are essential.
"But I support him. Step by step, we will get there."