Jimmy Buffett & the Coral Reefer Band had to delay their concert in Charleston, South Carolina this weekend, because the singer is in the hospital.

Buffett shared the news on his website and social media.

“I just came back from the Bahamas two days ago, after warming up from the California ‘winter tour,’ and I was eager to go to Charleston,” he wrote. “But I had to stop in Boston for a check-up and ended up in the hospital to deal with some problems that required urgent attention.”

He added, “Getting old is not easy, I can tell you that.”

The 76-year-old did not reveal what his health issue is, but he assured his fans that he will do his postponed concert as soon as he can.

“I appreciate your prayers and thoughts, your amazing loyalty over the years, and don’t forget, ‘NOT YET!’” he concluded.

People who have tickets will get an email about the new date.