Diabate admits he's excited about the prospect.
“This autumn, I was disappointed not to see the interest of Rennes come true, but when my advisor told me about the interest of Leicester, it immediately excited me and today is a dream come true," Diabate told L'Equipe.
“I want to thank my mother who has always supported me despite my different challenges, my advisers for the confidence they have in me but also the officials of Gazélec who offered me my first professional contract."
Meanwhile, Leicester boss Claude Puel admits he was pleased with Adrien Silva's performance for their FA Cup draw with Fleetwood.
“I think it was difficult for him like the other players because we didn't have control of the game," admitted Puel.
“He is a player who likes to play. He is a good footballer with lots of quality but it was difficult for him, it was difficult to play on the floor.
“He battled and he ran and for his first game in England it is a good thing. It was a good baptism for him."