Port-an-existing-app-to-OOD.md

@@ -29,7 +29,7 @@ We will be replacing the `awesim_rails` gem with the `ood_appkit` gem, and updat
 
 ##### Use `require: 'dotenv/rails-now`
 
-OodAppkit requires environment variables to be set before Rails loads. Modify your 'dotenv-rails' gem as follows:
+OodAppkit requires environment variables to be set before Rails loads. Modify or add your 'dotenv-rails' gem as follows:
 
 ```diff
 +gem 'dotenv-rails', '~> 2.1', require: 'dotenv/rails-now'