X(isspace) \
X(isupper) \
X(isxdigit) \
+ X(tolower) \
+ X(toupper) \
#if (defined (_BSD_SOURCE) && _BSD_SOURCE) || \
(defined (_SVID_SOURCE) && _SVID_SOURCE) || \
(defined (_XOPEN_SOURCE) && _XOPEN_SOURCE)
-# define CTYPE_FUNCTION_ISASCII X(isascii)
+# define CTYPE_FUNCTION_ISASCII X(isascii) \
+ X(toascii)
#else
# define CTYPE_FUNCTION_ISASCII
#endif