diff --git a/js/ui/init.js b/js/ui/init.js
index a7cf7db3e..735a367bb 100644
--- a/js/ui/init.js
+++ b/js/ui/init.js
@@ -2,6 +2,7 @@ import GLib from 'gi://GLib';
 import Gio from 'gi://Gio';
 
 import './environment.js';
+import {formatError} from '../misc/errorUtils.js';
 
 // Run the Mutter main loop after
 // GJS finishes resolving this module.
@@ -10,8 +11,7 @@ imports._promiseNative.setMainLoopHook(() => {
     GLib.idle_add(GLib.PRIORITY_DEFAULT, () => {
         import('./main.js').then(main => main.start()).catch(e => {
             const error = new GLib.Error(
-                Gio.IOErrorEnum, Gio.IOErrorEnum.FAILED,
-                `${e.message}\n${e.stack}`);
+                Gio.IOErrorEnum, Gio.IOErrorEnum.FAILED, formatError(e));
             global.context.terminate_with_error(error);
         });
         return GLib.SOURCE_REMOVE;