diff --git a/kitty/boss.py b/kitty/boss.py
index 27cd65f8b..e96875f4f 100644
--- a/kitty/boss.py
+++ b/kitty/boss.py
@@ -508,6 +508,7 @@ def list_os_windows(
                         'is_focused': focused_wid == os_window_id,
                         'last_focused': os_window_id == last_focused,
                         'tabs': tabs,
+                        'active_tab_history': tuple(tm.active_tab_history),
                         'wm_class': tm.wm_class,
                         'wm_name': tm.wm_name,
                         'background_opacity': bo,