diff --git a/js/ui/endSessionDialog.js b/js/ui/endSessionDialog.js
index 44747ea28..cd6e71248 100644
--- a/js/ui/endSessionDialog.js
+++ b/js/ui/endSessionDialog.js
@@ -29,8 +29,6 @@ const UserWidget = imports.ui.userWidget;
 
 const { loadInterfaceXML } = imports.misc.fileUtils;
 
-Gio._promisify(Gio.DBusConnection.prototype, 'call', 'call_finish');
-
 const _ITEM_ICON_SIZE = 64;
 
 const EndSessionDialogIface = loadInterfaceXML('org.gnome.SessionManager.EndSessionDialog');
diff --git a/js/ui/environment.js b/js/ui/environment.js
index 6764bd279..d1724a464 100644
--- a/js/ui/environment.js
+++ b/js/ui/environment.js
@@ -14,6 +14,8 @@ const { Clutter, Gio, GLib, GObject, Meta, Shell, St } = imports.gi;
 const Gettext = imports.gettext;
 const System = imports.system;
 
+Gio._promisify(Gio.DBusConnection.prototype, 'call', 'call_finish');
+
 let _localTimeZone = null;
 
 // We can't import shell JS modules yet, because they may have