diff --git a/README.md b/README.md
index fa6feb5d..dd04efca 100644
--- a/README.md
+++ b/README.md
@@ -176,6 +176,7 @@ See the `example` folder for a sample Rails app that has been documented.  The s
 
 ## Configuration options
 ```ruby
+require 'rspec_api_documentation'
 # Values listed are the default values
 RspecApiDocumentation.configure do |config|
   # Set the application that Rack::Test uses