diff --git a/README.md b/README.md
index 983f43c5a..cf67924ae 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,7 @@ $ gem install google-api-client
 ```ruby
 require 'google/api_client'
 require 'google/api_client/client_secrets'
+require 'google/api_client/auth/installed_app'
 
 # Initialize the client.
 client = Google::APIClient.new(