My 4th gen iPod Touch is missing the auto brightness option.

I recently noticed that my iPod Touch 4g is missing the auto brightness option in the settings. I have no way of enabling it. I have updated the firmware once since I got it, to iOS 6.0.1.

I'm at a total loss here, how can I make the auto brightness option become available? It should be there since it's a 4th gen iPod.

All help is appreciated.