Ginsburg spoke Friday at New England Law's annual "Law Day."
In a question-and-answer session, she said the nine justices only take pictures together when a new member is added. She said: "We haven't had any of those for some time, but surely we will soon."
She declined to take questions from reporters at the event.
The 75-year-old justice had surgery last month for pancreatic cancer but returned to the bench without missing a day of work. She said advice from fellow cancer survivor Sandra Day O'Connor on when to schedule chemotherapy has helped her to keep up with the court's pace.