The festival organiser claimed that the lack of big name headliners was behind the reduced volume of fans registering for the event.
He told the BBC: "There's not as many as last year because we haven't got the super, big, big, big sort of headlining act anymore.
"We've gone for something middle range although Jay-Z is huge in America. It's going to be absolutely brilliant. But it's not like a Radiohead or a Muse or a Coldplay or an Oasis is it?"
Kings of Leon and The Verve will join Jay-Z in headlining the Pyramid Stage at this year's bash.
Glastonbury tickets go on sale at 9am, April 6. Anybody wanting to go must register with the festival by midnight tonight. Glastonbury takes place on June 27-29 at Worthy Farm, Pilton.
The Enemy, Goldfrapp and Editors became the latest acts to confirm themselves for the summer event earlier this week.