Supreme Court Justice Antonin Scalia said on Wednesday that he has yet to weigh in on the constitutionality of gay marriage itself.

In a scathing dissent from a June decision by the court, Scalia criticized the court's majority for knocking down the Defense of Marriage Act (DOMA), which prohibited the federal government from recognizing the legal marriages of gay and lesbian couples.

“I haven't expressed my view about gay marriage,” Scalia is quoted as saying by Reuters during a speech delivered at Tufts University in Medford, Massachusetts.

“The issue in the DOMA case was not whether the Constitution requires states to allow gay marriage. That was not the question at all. The question is whether Congress can define marriage in all of the statues that Congress enacted to mean only marriage between a man and a woman.”

Scalia, who has previously said that he applies the words in the U.S. Constitution as they were understood by its authors, conceded that the issue could return to the court.

“I'm waiting for the second shoe to drop,” he said.

(Related: Ruth Bader Ginsburg officiates over second wedding of a gay couple.)