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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 cfa53c7c8d..5c8d1b7f04 100644
--- a/posix/unistd.h
+++ b/posix/unistd.h
@@ -552,12 +552,11 @@ extern __pid_t vfork __P ((void));
 /* Return the pathname of the terminal FD is open on, or NULL on errors.
    The returned storage is good only until the next call to this function.  */
 extern char *ttyname __P ((int __fd));
-#ifdef __USE_REENTRANT
+
 /* Store at most BUFLEN characters of the pathname of the terminal FD is
    open on in BUF.  Return 0 on success, -1 otherwise.  */
 extern int __ttyname_r __P ((int __fd, char *__buf, size_t __buflen));
 extern int ttyname_r __P ((int __fd, char *__buf, size_t __buflen));
-#endif
 
 /* Return 1 if FD is a valid descriptor associated
    with a terminal, zero if not.  */