diff --git a/README.md b/README.md
index 5be5557..3fff572 100644
--- a/README.md
+++ b/README.md
@@ -92,6 +92,7 @@ Example Program
 Cool.io provides a Sinatra-like DSL for authoring event-driven programs:
 
     require 'cool.io'
+    require 'cool.io/dsl'
 
     ADDR = '127.0.0.1'
     PORT = 4321