Continue running (not freeze) when headset is removed

Hi,
I am currently developing a game for the Oculus Rift in unity and have hit a problem that only accuser in the built game.
In the built program when the headset is removed the game stops and doesn't continue until the headset is reequipped (or you cover the sensor in the headset).
Is there a way to prevent this freeze in code rather then using something to cover the sensor?