diff --git a/Large-app-how-to.md b/Large-app-how-to.md
index f24e610..fb87061 100644
--- a/Large-app-how-to.md
+++ b/Large-app-how-to.md
@@ -125,7 +125,7 @@ We'll create 4 modules, a user module (manage user's registration, login, lost p
 * `SECRET_KEY` will be used to sign cookies. Change it and all your users will have to login again.
 * `ADMINS` will be used if you need to email information to the site administrators.
 * `SQLALCHEMY_DATABASE_URI` and `DATABASE_CONNECT_OPTIONS` are SQLAlchemy connection options (hard to guess)
-* `THREAD_PAGE` my understanding was 2/core... might be wrong :)
+* `THREADS_PER_PAGE` my understanding was 2/core... might be wrong :)
 * `CSRF_ENABLED` and `CSRF_SESSION_KEY` are protecting against form post fraud
 * `RECAPTCHA_*` WTForms comes with a `RecaptchaField` ready to use... just need to go to recaptcha website and get your public and private key.