The U.S. Senate will consider a bill seeking to ban anti-LGBT workplace bias next week.

The Employment Non-Discrimination Act (ENDA) seeks workplace protections based on sexual orientation and gender identity. The bill, first proposed in 1994, cleared a Senate committee with the help of three Republicans in July.

Fred Sainz, a spokesman for the Human Rights Campaign (HRC), the nation's largest LGBT rights advocate, told BuzzFeed on Wednesday that the bill would come up for a vote next week.

“Late last night, [Senate Majority] Leader [Harry] Reid informed [Senate Minority] Leader [Mitch] McConnell that the Senate will consider ENDA next week. It's still unclear as to when Leader Reid will file for cloture.”

The announcement caps three days in which three remaining Democratic holdouts in the Senate announced their support for the measure.

Senators Joe Manchin of West Virginia, Mark Pryor of Arkansas and Bill Nelson of Florida endorsed the measure this week.

With a united Democratic front, the measure is within one vote of gaining the support it needs to clear the Senate.

A possible fourth Republican vote could come from Ohio's Rob Portman, who earlier this week said he was leaning in that direction. Portman announced in March his support for marriage equality. He said he reversed his stance after learning that his son is gay.