Vice President Joe Biden doesn’t seem to know gay marriage was legalized last summer, since he told law graduates Saturday that it’s an issue they need to fight for.

“When your brother is not allowed to marry the man he loves, you are diminished,” Biden said during his commencement speech at Syracuse University School of Law.

On June 26, 2015, the 5-4 decision in the Obergefell v. Hodges case legalized gay marriage nationwide. Biden even commented on the result that day: “This day is for history to remember as one where, as a nation, our laws finally recognize that all people should be treated with respect and dignity—and that all marriages, at their root, are defined by unconditional love,” the Vice President said in a statement.

Biden told the graduates on Friday that “you have the intellectual horsepower to make things better.” He said graduates should be concerned about climate change, to connect with the world outside of technology, and that he was glad to see so many women in the legal profession.