The winner of one Oregon Republican primary will be decided at 11 a.m. Thursday — by the flip of coin. And whether it’s heads or tails, the end result is certain to be unusual.

No Republicans filed for this May’s primary election to run to replace Eugene-based state Rep. Paul Holvey, a Democrat who’s leaving the Legislature after 20 years.

The two candidates who got the most write-in votes for the Republican nomination were tied. They are also the two people who ran for the Democratic nomination.

Lisa Fragala won the May Democratic primary for House District 8. If she wins tomorrow’s coin flip, she’ll be on the November ballot as both the Democratic and the Republican nominee.

Related: After surviving recall attempt, Oregon Rep. Paul Holvey quits anyway

But under Oregon’s so-called “Sore Loser” law, if somebody loses a primary election for one party, they aren’t allowed to be on the general election ballot for any other party. So if Doyle Canning — who lost the Democratic primary in May — wins the coin flip, that means there may not be a Republican nominee for House District 8 this November, unless the party decides to hold a precinct convention to pick someone else.

Ties in elections are unusual. The last coin flip to determine a state legislative primary winner was in 2016.