Activists on Thursday vowed to return to the ballot box next year to overturn Proposition 8, California's gay marriage ban, if the Supreme Court upholds its constitutionality in a decision expected next week.

“If we lose, we're going to fight like hell to make sure we return marriage equality in California in 2014,” Adam Bink, director of online programs for progressive group the Courage Campaign, is quoted as saying by The Los Angeles Times.

Bink make his remarks during the opening day of Netroots Nation, the annual gathering of liberal bloggers taking place through Saturday in San Jose, California.

The landmark case Hollingsworth v. Perry was filed in 2009 and made its way to the Supreme Court in March. With a week left in the current term, the court is widely expected to rule on the case sometime next week.

In 2010, Courage Campaign initially backed an effort to put a referendum on the ballot that sought to repeal Proposition 8. However, other groups, including Equality California, the state's largest LGBT rights advocate, said that they would prefer to wait for the court's ruling before committing to a repeal campaign.