1 files changed, 1 insertions, 1 deletions

diff --git a/include/unistd.h b/include/unistd.h
index c56fb4f11b41..9bc7af71e27f 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -365,7 +365,7 @@ long	 sysconf(int);
 pid_t	 tcgetpgrp(int);
 int	 tcsetpgrp(int, pid_t);
 char	*ttyname(int);
-char	*ttyname_r(int, char *, size_t);
+int	ttyname_r(int, char *, size_t);
 int	 unlink(const char *);
 ssize_t	 write(int, const void *, size_t);