diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index f38ae01..892c923 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2866,7 +2866,7 @@
 		no_tty();
 		return 0;
 	case TIOCSCTTY:
-		return tiocsctty(tty, file, arg);
+		return tiocsctty(real_tty, file, arg);
 	case TIOCGPGRP:
 		return tiocgpgrp(tty, real_tty, p);
 	case TIOCSPGRP: