It's back to the future for voters in the mayor's race this fall, as a source says the old lever voting machines are set to replace the city's new high-tech optical scanning machines.
A source tells NY1 a deal has been made in the New York State legislature that will allow the old machines to be used for the September 10 primary.
New York City Board of Elections officials say the new optical scanners are too slow to allow them to plan for a likely runoff in the crowded Democratic primary race.
A runoff is necessary if no candidate wins at least 40 percent of the vote.
It's unclear if the old machines will also be used for the November 5 general election.
The city spent more than $95 million on the new optical scanning machines, which were first used in 2010.