Possible bug in hide-ifdef-mode

If I do M-x hide-ifdef-mode in a C++/C mode buffer, hide-ifdef minor mode is correctly initialised except for the keymap, which is not bound in. So C-c ＠ just says C-c ＠ not defined, and C-h b errors with "Wrong type argument: keymapp, hide-ifdef-mode-map". This is obviously not a great state of affairs in vanilla xemacs. Cribbing from hideshow.el, it appears that a line of the following form is required: (fset 'hide-ifdef-mode-map hide-ifdef-mode-map) and indeed this cures the problem. The question is, is this the right way to fix the problem and is it Emacs compatible? If someone can assure me as to the rightness of this patch, I'll submit it to xemacs-patches. Cheers, Malcolm