A married man and woman in Brooklyn, N.Y., want to annul their marriage in protest over last week’s vote against marriage equality in the state senate.

Matthew D’Olimpio and Rachel Murch D’Olimpio (pictured), who have been married for two years, want to invalidate their marriage as an act of solidarity with Matthew’s gay brother, Christopher.

The couple contend that all marriages are invalid because of discrimination against gay couples, according to the New York Post. 

“Unlike a divorce, an annulment invalidates a marriage as never having occurred,” reports the Post. “Grounds for an annulment are misrepresentation or fraud, concealment, refusal or inability to consummate the marriage or a misunderstanding.”

Matthew and Rachel are seeking a pro bono attorney to represent them. In the meantime, according to the Post, they have created a Facebook page for like-minded couples, called Annul Our Marriage for Equality.