WICHITA, Kan. (AP) — Kansas Gov. Laura Kelly has signed a bill that requires election officials to notify voters before their mail-in ballots are thrown out because of signature problems.

An Associated Press analysis of rejected ballots in the 2018 primary in the state’s most populous county found that 153 mail-in ballots were not counted because of signatures that didn’t match county voting records.

Then-Secretary of State Kris Kobach defeated then-Gov. Jeff Colyer for the Republican gubernatorial nomination in that race by only 343 votes. The close Republican primaryhighlighted differences in how Kansas counties handled mail-in ballots.

The legislationKelly signed Monday gives voters an additional week or longer to provide a signature.