guile-gnome tutorial: gobject: #:signal or #:gsignal?

[gregory benison]

In the guile-gnome tutorial, gobject section:

Should #:signal be replaced with #:gsignal?
Otherwise the example does not work (when I try it at least).

;; deriving from <gobject>
(define-class <test> (<gobject>)
  ;; a normal object slot
  my-data

  ;; an object slot exported as a gobject property
  (pub-data #:param-spec (list <gparam-long> #:name 'test))

  ;; a signal with no arguments and no return value
  #:gsignal '(frobate #f))