diff --git a/tmux.h b/tmux.h
index 3438e794..54a50106 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1181,6 +1181,7 @@ LIST_HEAD(tty_terms, tty_term);
 
 struct tty {
 	struct client	*client;
+	struct event	 start_timer;
 
 	u_int		 sx;
 	u_int		 sy;
diff --git a/tty.c b/tty.c
index a1324528..3d58f05b 100644
--- a/tty.c
+++ b/tty.c
@@ -285,11 +285,22 @@ tty_open(struct tty *tty, char **cause)
 	return (0);
 }
 
+static void
+tty_start_timer_callback(__unused int fd, __unused short events, void *data)
+{
+	struct tty	*tty = data;
+	struct client	*c = tty->client;
+
+	log_debug("%s: start timer fired", c->name);
+	tty->flags |= (TTY_HAVEDA|TTY_HAVEDSR);
+}
+
 void
 tty_start_tty(struct tty *tty)
 {
 	struct client	*c = tty->client;
 	struct termios	 tio;
+	struct timeval	 tv = { .tv_sec = 1 };
 
 	if (tty->fd != -1 && tcgetattr(tty->fd, &tty->tio) == 0) {
 		setblocking(tty->fd, 0);
@@ -328,9 +339,13 @@ tty_start_tty(struct tty *tty)
 			tty_puts(tty, "\033[?1004h");
 		}
 		tty_puts(tty, "\033[c\033[1337n"); /* DA and DSR */
+
 	} else
 		tty->flags |= (TTY_HAVEDA|TTY_HAVEDSR);
 
+	evtimer_set(&tty->start_timer, tty_start_timer_callback, tty);
+	evtimer_add(&tty->start_timer, &tv);
+
 	tty->flags |= TTY_STARTED;
 	tty_invalidate(tty);
 
@@ -351,6 +366,8 @@ tty_stop_tty(struct tty *tty)
 		return;
 	tty->flags &= ~TTY_STARTED;
 
+	evtimer_del(&tty->start_timer);
+
 	event_del(&tty->timer);
 	tty->flags &= ~TTY_BLOCK;