Republicans are adding another $8 billion over five years to their health bill to help Americans with pre-existing medical conditions pay for insurance, the latest such supplement designed to stop moderates and a few skeptical conservatives from bailing on the legislation.

The amendment brings Reps. Fred Upton and Billy Long, the two sponsors of the language, back to the “yes” column on the American Health Care Act, keeping the GOP within striking distance of preserving a slim majority of 216 votes for passage. Both lawmakers switched their votes to no earlier this week because of a House Freedom Caucus-favored amendment that allows states to conditionally waive an Obamacare regulation prohibiting insurers on the individual market from charging consumers different premiums based on their health status. Upton and Long—with some fellow GOP members and the entire Democratic caucus—feared the policy would eliminate protections for individuals with pre-existing conditions, since undoing the Obamacare mandate would allow insurers to charge such people higher premiums.