echo route defined without a route-name

[librejutsu]

Hello,
In one of the 'get-started' tutorial steps there's an 'echo' route defined in multiple places without a :route-name. See here: http://pedestal.io/guides/hello-world-content-types

As a result, when I try to (require 'hello) I get the following error:
The whole route was: ["/echo" :get #object[hello$echo 0xaae69d3 "hello$echo@aae69d3"]] default-route-name
Adding :route-name :echo at the end of the route definition resolves the problem.