diff --git a/src/sysdep.c b/src/sysdep.c
index 8da7d6a4784..953e451805e 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -1334,7 +1334,7 @@ init_sys_modes (tty_out)
 #ifdef MSDOS	/* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
   if (!tty_out->term_initted)
     internal_terminal_init ();
-  dos_ttraw ();
+  dos_ttraw (tty_out);
 #endif
 
   EMACS_SET_TTY (fileno (tty_out->input), &tty, 0);