===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/window-tree.c,v
retrieving revision 1.56
retrieving revision 1.57
diff -u -r1.56 -r1.57
--- src/usr.bin/tmux/window-tree.c	2021/08/20 19:50:17	1.56
+++ src/usr.bin/tmux/window-tree.c	2021/10/13 09:28:36	1.57
@@ -1,4 +1,4 @@
-/* $OpenBSD: window-tree.c,v 1.56 2021/08/20 19:50:17 nicm Exp $ */
+/* $OpenBSD: window-tree.c,v 1.57 2021/10/13 09:28:36 nicm Exp $ */
 
 /*
  * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -519,7 +519,7 @@
 
 	if (ox > 1 && ox + len < sx - 1 && sy >= 3) {
 		screen_write_cursormove(ctx, px + ox - 1, py + oy - 1, 0);
-		screen_write_box(ctx, len + 2, 3);
+		screen_write_box(ctx, len + 2, 3, NULL);
 	}
 	screen_write_cursormove(ctx, px + ox, py + oy, 0);
 	screen_write_puts(ctx, gc, "%s", label);