===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/popup.c,v
retrieving revision 1.32
retrieving revision 1.33
diff -u -r1.32 -r1.33
--- src/usr.bin/tmux/popup.c	2021/08/13 23:05:40	1.32
+++ src/usr.bin/tmux/popup.c	2021/08/17 07:14:33	1.33
@@ -1,4 +1,4 @@
-/* $OpenBSD: popup.c,v 1.32 2021/08/13 23:05:40 nicm Exp $ */
+/* $OpenBSD: popup.c,v 1.33 2021/08/17 07:14:33 nicm Exp $ */
 
 /*
  * Copyright (c) 2020 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -554,6 +554,7 @@
 	if (size == 0)
 		return;
 
+	tty_sync_start(&c->tty);
 	if (pd->md != NULL) {
 		c->overlay_check = menu_check_cb;
 		c->overlay_data = pd->md;