diff --git a/lib/zero/controller.rb b/lib/zero/controller.rb
index 6c64d8f..3c3af8c 100644
--- a/lib/zero/controller.rb
+++ b/lib/zero/controller.rb
@@ -11,7 +11,7 @@ module Zero
     end
 
     # initialize the controller
-    # @param Request a request object
+    # @param request [Request] a request object
     def initialize(request)
       @request  = request
       @response = Rack::Response.new