-(defconst mime-tspecials "][()<>@,\;:\\\"/?=")
-(defconst mime-token-regexp (concat "[^" mime-tspecials "\000-\040]+"))
+(eval-and-compile
+ (defconst mime-tspecial-char-list
+ '(?\] ?\[ ?\( ?\) ?< ?> ?@ ?, ?\; ?: ?\\ ?\" ?/ ?? ?=)))
+(defconst mime-token-regexp
+ (eval-when-compile
+ (concat "[^" mime-tspecial-char-list "\000-\040]+")))