ExxonMobil shareholders on Wednesday voted against adding sexual orientation and gender identity to the company's official Equal Employment Opportunity (EEO) policy, gay weekly The Dallas Voice reported.

Eighty percent of shareholders meeting at the Meyerson Symphony Center in Dallas voted against the resolution which asks the corporation to amend “its written equal employment opportunity policy to explicitly prohibit discrimination based on sexual orientation and gender identity and to substantially implement the policy.” The vote makes ExxonMobil the only remaining Fortune 50 company to not offer gay protections.

The resolution first appeared in 1999 – the year the two oil giants merged. In 2008, it received nearly 40 percent support.

“It's disappointing, but this isn't the end of the issue for us,” said Resource Center Dallas' Rafael McDonnell, who has lobbied for the resolution. “We're going to continue to reach out and engage them.”

Before merging with Exxon, Mobil Corp. offered such workplace protections and domestic partner benefits. But after the merger Exxon's policies were carried forward and new employees were no longer offered domestic partner benefits.

The Human Rights Campaign (HRC), the nation's largest gay rights advocate, responded to the vote by calling on ExxonMobil to implement the policy changes on its own.

“The shareholder resolution to add sexual orientation and gender identity to ExxonMobil's EEO policy was a non-binding referendum and the company still has the chance to do the right thing,” said HRC President Joe Solmonese. “As perhaps the largest corporation in the country, ExxonMobil has a responsibility to be a good corporate citizen; sadly they have fallen far short. The company has resisted offering basic employment protections for their LGBT workers for years and it's time they treat all of their employees like the valuable assets they are.”