diff --git a/wezterm-gui/src/overlay/debug.rs b/wezterm-gui/src/overlay/debug.rs
index fd08481cb..aa1cee057 100644
--- a/wezterm-gui/src/overlay/debug.rs
+++ b/wezterm-gui/src/overlay/debug.rs
@@ -1,3 +1,4 @@
+use crate::scripting::guiwin::GuiWin;
 use chrono::prelude::*;
 use log::Level;
 use luahelper::ValueWrapper;
@@ -64,13 +65,14 @@ impl LineEditorHost for LuaReplHost {
     }
 }
 
-pub fn show_debug_overlay(mut term: TermWizTerminal) -> anyhow::Result<()> {
+pub fn show_debug_overlay(mut term: TermWizTerminal, gui_win: GuiWin) -> anyhow::Result<()> {
     term.no_grab_mouse_in_raw_mode();
 
     let lua = config::Config::load()?
         .lua
         .ok_or_else(|| anyhow::anyhow!("failed to setup lua context"))?;
     lua.load("wezterm = require 'wezterm'").exec()?;
+    lua.globals().set("window", gui_win)?;
 
     let mut latest_log_entry = None;
     let mut host = LuaReplHost {
diff --git a/wezterm-gui/src/termwindow/mod.rs b/wezterm-gui/src/termwindow/mod.rs
index acc74acc9..ae4bf4523 100644
--- a/wezterm-gui/src/termwindow/mod.rs
+++ b/wezterm-gui/src/termwindow/mod.rs
@@ -1287,8 +1287,10 @@ impl TermWindow {
             None => return,
         };
 
+        let gui_win = GuiWin::new(self);
+
         let (overlay, future) = start_overlay(self, &tab, move |_tab_id, term| {
-            crate::overlay::show_debug_overlay(term)
+            crate::overlay::show_debug_overlay(term, gui_win)
         });
         self.assign_overlay(tab.tab_id(), overlay);
         promise::spawn::spawn(future).detach();