By Jessica Goodman
October 15, 2015 at 02:34 PM EDT
Gary Miller/Getty Images

Willie Nelson has canceled and rescheduled a handful of concert dates after announcing an unspecified illness. The note appeared on the country legend’s Facebook page and said that he had been “feeling under the weather.

The affected concert dates include shows in South Carolina, Virginia, and Pennsylvania, and were part of the Django and Jimmie Tour, Nelson’s run with Merle Haggard.

“This is all news to us at the moment and we’re still getting details on Willie’s medical concern,” Nick Hooker, Senior Marketing Manager the Florence Civic Center in South Carolina, told Taste of Country. “We’ve been told this is not life-threatening, but will require several weeks to fully recover.”

Nelson’s rep told EW that the tour starts up on Sunday.

Earlier this year, Nelson received the prestigious Gershwin Prize for Popular Song, given by the Library of Congress. He also helmed the annual Farm Aid concert, which held its 30th anniversary show in Chicago this summer.