diff --git a/conservancy/settings/prod.py b/conservancy/settings/prod.py
index 9d74476d..35b9b52b 100644
--- a/conservancy/settings/prod.py
+++ b/conservancy/settings/prod.py
@@ -43,5 +43,4 @@ STRIPE_ENDPOINT_SECRET = get_secret(secrets, 'STRIPE_ENDPOINT_SECRET')
 
 CAPTCHA_FLITE_PATH = '/usr/bin/flite'
 CAPTCHA_SOX_PATH = '/usr/bin/sox'
-CAPTCHA_LETTER_ROTATION = (-25, 25)
-CAPTCHA_NOISE_FUNCITONS = ('captcha.helpers.noise_dots',)
+CAPTCHA_NOISE_FUNCTIONS = ('captcha.helpers.noise_dots',)