1 files changed, 1 insertions, 1 deletions
diff --git a/sysdeps/stub/ttyname_r.c b/sysdeps/stub/ttyname_r.c
index 7a05629c43..3c0306caaa 100644
--- a/sysdeps/stub/ttyname_r.c
+++ b/sysdeps/stub/ttyname_r.c
@@ -26,7 +26,7 @@ int
 ttyname_r (fd, buf, buflen)
      int fd;
      char *buf;
-     int buflen;
+     size_t buflen;
 {
   __set_errno (ENOSYS);
   return -1;