Under the current bill, immigrants would have to earn English proficiency or show they are enrolled in a language course. Rubio, a member of the bipartisan group that developed the legislation, plans to offer an amendment that would eliminate the second provision and require that undocumented immigrants be able to read, write and speak English before earning a green card.

The Senate bill allows undocumented immigrants to apply for a green card after 10 years and then apply for citizenship three years later.

“On the day we announced the principles that would shape the immigration bill, we made it clear that English proficiency would now be required for permanent residency for the first time in American history,” Rubio said in a statement. “This amendment ensures that will be the case.”