Leicester City edged past League Two Gillingham 1-0 in the FA Cup third round in blustery conditions at Priestfield Stadium, Abbeylivenetwork.com reports.
The Foxes were limited in chances and frustrated in the first half by a well-organised Gillingham side.
Iheanacho scored the winning goal four minutes before the hour mark after Jamie Vardy set him up.
Since the Nigeria international’s debut in the competition in 2016 for Manchester City, no player has scored more goals than him in the competition.
The 26-year-old has now netted 16 times in 22 games in the competition.
Iheanacho’s international teammate, Wilfred Ndidi featured as a substitute in the game.
Ndidi replaced Senegal midfielder, Namplays Mendy nine minutes from time.