[racket] normalize-response (in the context of web server)

While trying out dherman's site generator (from
planet.racket-lang.oracketg/package-source/dherman/static-page.plt/1/0/main.ss),
the following error is thrown:

normalize-response: unbound identifier

This procedure does not turn up in Search Manuals. Is there way to fix/work
around this?

jGc
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.racket-lang.org/users/archive/attachments/20130430/4b247a30/attachment.html>