Apple is delaying the release of watchOS 2, which Apple Watch owners were expecting to see today alongside the release of iOS 9, TechCrunch reports. “We have discovered a bug in development of watchOS 2 that is taking a bit longer to fix than we expected,” an Apple spokesperson said. “We will not release watchOS 2 today but will shortly.” Apple didn’t say specifically which part of the OS was affected by the bug or set a date for watchOS 2’s eventual release. The company has only pushed back a major OS release once before, when a VoIP bug was discovered in iOS 4.2 in 2010. Today’s release of iOS 9 seems to be unaffected by whatever hindered watchOS 2 and is still on schedule for 1 p.m. Eastern Time.