People who rely on their iPhone alarms to wake them up have been getting a rude awakening — actually, a non-awakening — because overnight upgrades have shut them off.

Since iPhones automatically restart and turn off alarms after an update, people who download the latest iOS 9.1 update overnight have to reset their alarms afterward, Apple told users.

The snafu sparked outrage online this week, with users complaining they got to work or school late because of the glitch.