"Return t if SYMBOL's function definition is a basic function."
(and (fboundp symbol)
(or (subrp (symbol-function symbol))
- (string-equal (symbol-file symbol) "subr"))))
+ (and (fboundp 'symbol-file)
+ (string-equal (symbol-file symbol) "subr")))))
(if (featurep 'xemacs)
nil