Ndidi has been out with adductor tears since September.
Browsing: Zorya Luhansk
With Zorya Luhansk beating AEK Athens in the other game in Group G, a draw was good enough for the Foxes to seal qualification with two matches remaining.
James Maddison, Harvey Barnes and Iheanacho struck to give the Foxes victory in their Group G opener.
Nigeria international Dennis has impressed with his Belgian side this season, having caught the eye of English fans during his performances against Manchester United in the Europa League.