LONDON, UNITED KINGDOM - JULY 04: Ozzy Osbourne of Black Sabbath performs on stage at British Summer Time Festival at Hyde Pa
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Black Sabbath has postponed two of its arena shows on The End tour after Ozzy Osbourne fell ill over the weekend. The band canceled its Saturday night performance at Rexall Place in Edmonton just hours before the band was supposed to take the stage.

“Due to extreme sinusitis with Ozzy Osbourne the shows in both Edmonton and Calgary have been postponed,” the band posted on Facebook. “Details regarding rescheduled dates will be announced as soon as they are available.”

The Calgary performance was scheduled for Monday night (Feb. 1) at the Scotiabank Saddledome. Black Sabbath’s North American leg of The End tour wraps up on Feb. 27 in New York.

The hard rock legends have stated that this will be their final tour ever. Click here to see highlights from Ozzy’s epic Voodoo Fest headlining show in October.