How would you reconcile Passive Perception on someone with Exhaustion?

@ChrisPerkinsDnD Heya Chris! How would you reconcile Passive Perception on someone with Exhaustion? I just said flat -5 to score. Yay/Nay?

— The Den of Sin (@thedenofsin) February 23, 2016

Yay! https://t.co/cgH3fpYLXl

— Christopher Perkins (@ChrisPerkinsDnD) February 23, 2016