The Illinois House voted Tuesday to increase the age to buy cigarettes from 18 to 21.
Supporters say the legislation will help reduce the number of Illinois teens who pick up the habit early.
House Minority Leader Jim Durkin previously opposed the bill but says after more research, and hearing how prevalent smoking is in high school, he changed his mind.
More than 30 communities including the city of Chicago already have a “Tobacco 21” law on the books.
The bill now heads to a senate for a vote.