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-rw-r--r--posix/unistd.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/posix/unistd.h b/posix/unistd.h
index 98ffcea649..625ba77da7 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -781,8 +781,7 @@ extern int ttyname_r (int __fd, char *__buf, size_t __buflen)
with a terminal, zero if not. */
extern int isatty (int __fd) __THROW;
-#if defined __USE_MISC \
- || (defined __USE_XOPEN_EXTENDED && !defined __USE_UNIX98)
+#ifdef __USE_MISC
/* Return the index into the active-logins file (utmp) for
the controlling terminal. */
extern int ttyslot (void) __THROW;