Problem mapping <prior>

[Guido Van Hoecke]

I have a problem mapping <prior> into my personal keymap. Here's an
excerpt of my initialisation files:

    (if isOSX
        (setq leader "§")
      (setq leader "²"))

    (define-prefix-command 'guivho-map nil "guivho-")

    (define-key guivho-map leader 'guivho-save-and-kill-buffer)
    (define-key guivho-map "-" 'hl-line-mode)
    ...
    (define-key guivho-map "z" (lambda() (interactive) 
(switch-to-buffer-other-window "*scratch*" t)))
    (define-key guivho-map "<prior>" 'guivho-org-mobile-push)
    (global-set-key leader guivho-map)


The only map that does not work is the '<prior>' one.
Emacs claims: `$ <prior> is undefined`.

Any suggestions, any one?

TIA,


Guido

--
My own business always bores me to death; I prefer other people's.
                -- Oscar Wilde