diff --git a/README.md b/README.md
index 0c95be1..08d15a2 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ devise :kerberos_authenticatable
 attr_accessible :username
 ```
 
-* Update your User table in your database to include the username field.
+* Update your User table in your database to include the username field and remove the index from the email field.
 * Rebuild your Devise views automatically or by hand.
 
 ```