Leicester City edged past the Football League's bottom club Gillingham in the FA Cup third round at Priestfield Stadium.
The Foxes were limited in chances and frustrated in the first half by a well-organised Gillingham side.
They started the second half brighter and found the opening through Kelechi Iheanacho, who managed to fire home Kasey McAteer's drilled cross.
The draw for the fourth round takes place on 8 January at 16:05 GMT.
Leicester travel to Newcastle on Tuesday for a Carabao Cup quarter-final and Iheanacho told BBC Sport that Saturday's result will boost confidence.
"Obviously, this will give us momentum to go to the next cup competition," said the Nigeria forward.