;;; a mask to extract the type from a data block header word
(def!constant widetag-mask (1- (ash 1 n-widetag-bits)))
-(def!constant sb!xc:most-positive-fixnum
+(def!constant sb!xc:most-positive-fixnum
(1- (ash 1 (- n-word-bits n-lowtag-bits)))
#!+sb-doc
"the fixnum closest in value to positive infinity")