The Gang of Eight immigration bill does not yet have a 60-vote majority in the Senate, according to one of its authors, Sen. Bob Menendez.

During an interview with Univision’s Jorge Ramos, Menendez (D-N.J.) appeared confident that Congress will pass a comprehensive immigration reform bill. But he said the Senate bill’s backers haven’t yet cobbled together a large enough majority to avoid a potential filibuster.

“We don’t currently have 60 votes identified in the Senate,” he said during the interview with Ramos, which was conducted in Spanish for “Al Punto,” Univision’s Sunday public affairs show. “We need to add more votes on the floor.”