Country superstar Willie Nelson was slated to kick-off a tour this weekend, but due to some recent breathing issues, he has called-off the shows.

The 86-year-old took to Twitter last night, writing that he’s sorry to cancel the tour, but “I have a breathing problem that I need to have my doctor check out,” noting that he’ll be back. This weekend, the tour was supposed to stop in Grand Rapids, Michigan with Alison Krauss, followed by gigs in cities like Toledo, Charlottesville, and Greensboro before a string of Outlaw Music Festival concerts and an appearance in East Troy, Wisconsin for Farm Aid.

He did not announce any postponed dates at this time; fans should seek refunds at point of purchase.

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This is not the first time Nelson had to cancel due to breathing issues. Last year, he abruptly left the stage during a show in Salt Lake City after he experienced a shortness of breath, which he later cited was due to the venue’s high elevation. He also left the stage last year during Outlaw Music Festival in North Carolina due to illness and cancelled a string of shows in early 2018 after suffering from the flu.

Nonetheless, Nelson isn’t letting his age stop him from performing. In June, he announced a new Las Vegas residency, “Vegas On My Mind,” set for this October at the Venetian Theater.

Visit Ticket Club to find tickets to see Willie Nelson at a show this year