LOS ANGELES, CA - FEBRUARY 08: Singer Brian Johnson of AC/DC performs onstage during The 57th Annual GRAMMY Awards at the at
Kevork Djansezian/Getty Images

AC/DC has postponed its upcoming U.S. tour as frontman Brian Johnson received a medical warning that he is going deaf. 

In a statement posted on their official website, the Australian band explains:

“AC/DC are forced to reschedule the 10 upcoming dates on the US leg of their ‘Rock or Bust’ World Tour. AC/DC’s lead singer, Brian Johnson, has been advised by doctors to stop touring immediately or risk total hearing loss.”

The band wrote that it will likely include a guest vocalist for the remainder of its tour.

The U.S. leg, which was announced in December, began on February 2. The 10 shows that are being postponed for later this year will now run from March 8 through April 4, with the final performance taking place at NYC's Madison Square Garden.

The news of 68-year-old Johnson's deafness risk comes after the 2014 announcement that founder Malcolm Young stopped playing with the band after being diagnosed with dementia.