diff --git a/0001-appDisplay-Avoid-a-warning.patch b/0001-appDisplay-Avoid-a-warning.patch
new file mode 100644
index 0000000..9cb50ae
--- /dev/null
+++ b/0001-appDisplay-Avoid-a-warning.patch
@@ -0,0 +1,37 @@
+From 40ea93396d99726bf8fbb31ef4bf83585592e80b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Florian=20M=C3=BCllner?= <fmuellner@gnome.org>
+Date: Fri, 6 Aug 2021 18:15:40 +0200
+Subject: [PATCH] appDisplay: Avoid a warning
+
+At least the last stable release of gjs has an issue with async
+handlers for custom (i.e. defined in JS) GObject signals.
+
+The handler still works, but evoking it prints the following warning:
+
+  JS ERROR: Error: Could not guess unspecified GValue type
+
+We can avoid the warning by using the addAction() convenience
+method, which makes for a small nice cleanup anyway.
+
+https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/4531
+---
+ js/ui/appDisplay.js | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
+index f86a7bb67..012e88bd0 100644
+--- a/js/ui/appDisplay.js
++++ b/js/ui/appDisplay.js
+@@ -3531,8 +3531,7 @@ var AppIconMenu = class AppIconMenu extends PopupMenu.PopupMenu {
+ 
+             if (Shell.AppSystem.get_default().lookup_app('org.gnome.Software.desktop')) {
+                 this._appendSeparator();
+-                let item = this._appendMenuItem(_("Show Details"));
+-                item.connect('activate', async () => {
++                this.addAction(_('Show Details'), async () => {
+                     let id = this._source.app.get_id();
+                     let args = GLib.Variant.new('(ss)', [id, '']);
+                     const bus = await Gio.DBus.get(Gio.BusType.SESSION, null);
+-- 
+2.31.1
+
diff --git a/gnome-shell.spec b/gnome-shell.spec
index b01f1ca..f2f3771 100644
--- a/gnome-shell.spec
+++ b/gnome-shell.spec
@@ -2,7 +2,7 @@
 
 Name:           gnome-shell
 Version:        40.3
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Window management and application launching for GNOME
 
 License:        GPLv2+
@@ -31,6 +31,7 @@ Patch34: 0001-extensionDownloader-Refuse-to-override-system-extens.patch
 Patch35: fix-some-js-warnings.patch
 Patch36: 0001-st-texture-cache-purge-on-resume.patch
 Patch37: 0001-Update-generated-stylesheets.patch
+Patch38: 0001-appDisplay-Avoid-a-warning.patch
 
 %define eds_version 3.33.1
 %define gnome_desktop_version 3.35.91
@@ -249,6 +250,10 @@ desktop-file-validate %{buildroot}%{_datadir}/applications/evolution-calendar.de
 %{_mandir}/man1/gnome-shell.1*
 
 %changelog
+* Mon Aug 09 2021 Florian Müllner <fmuellner@redhat.com> - 40.3-2
+- Avoid a gjs warning
+  Resolves: #1990821
+
 * Mon Jul 12 2021 Florian Müllner <fmuellner@redhat.com> - 40.3-1
 - Update to 40.3
   Resolves: #1979143