diff --git a/README.md b/README.md
index 532e75d6..f0a79990 100644
--- a/README.md
+++ b/README.md
@@ -339,7 +339,13 @@ There are two things that is important to keep in mind:
 
 ### Omniauth
 
-Devise comes with Omniauth support out of the box to authenticate from other providers. You can read more about Omniauth support in the wiki:
+Devise comes with Omniauth support out of the box to authenticate from other providers. Note that you should specify all your omniauth configs in i`nitializers/devise.rb` **not** in a separate `omniauth.rb` initializer:
+
+```ruby
+config.omniauth :github, 'APP_ID', 'APP_SECRET', :scope => 'user,public_repo'
+```
+
+You can read more about Omniauth support in the wiki:
 
 * https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview