diff --git a/0001-schemas-add-a-scroll-button-locking-to-the-trackball.patch b/0001-schemas-add-a-scroll-button-locking-to-the-trackball.patch
new file mode 100644
index 0000000..d06fe7c
--- /dev/null
+++ b/0001-schemas-add-a-scroll-button-locking-to-the-trackball.patch
@@ -0,0 +1,33 @@
+From 1e58ab07356c4c44b814768fca56e2ce951617d0 Mon Sep 17 00:00:00 2001
+From: Peter Hutterer <peter.hutterer@who-t.net>
+Date: Tue, 8 Sep 2020 10:21:53 +1000
+Subject: [PATCH] schemas: add a scroll button locking to the trackball
+
+Where enabled, the first click of the scroll button sets the button logically
+down, the second click sets the button logically up.
+
+This is an accessibility feature, it doesn't require users to keep holding the
+button down while scrolling which is hard or impossible for some users.
+---
+ schemas/org.gnome.desktop.peripherals.gschema.xml.in | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/schemas/org.gnome.desktop.peripherals.gschema.xml.in b/schemas/org.gnome.desktop.peripherals.gschema.xml.in
+index 7ee3882..0c30c8a 100644
+--- a/schemas/org.gnome.desktop.peripherals.gschema.xml.in
++++ b/schemas/org.gnome.desktop.peripherals.gschema.xml.in
+@@ -210,6 +210,11 @@
+       <range min="0" max="24"/>
+       <summary>Mouse wheel emulation button. 0 to disable the feature.</summary>
+     </key>
++    <key name="scroll-wheel-emulation-button-lock" type="b">
++      <default>false</default>
++      <summary>Mouse wheel emulation button lock</summary>
++      <description>Set this to TRUE to enable button locking for the wheel emulation button. If enabled, the first click of the button enables scrolling, the second click disables scrolling again.</description>
++    </key>
+     <key name="accel-profile" enum="org.gnome.desktop.GDesktopPointerAccelProfile">
+       <default>'default'</default>
+       <summary>Acceleration profile</summary>
+-- 
+2.29.2
+
diff --git a/gsettings-desktop-schemas.spec b/gsettings-desktop-schemas.spec
index 98ed47d..3a25e2b 100644
--- a/gsettings-desktop-schemas.spec
+++ b/gsettings-desktop-schemas.spec
@@ -2,7 +2,7 @@
 
 Name:           gsettings-desktop-schemas
 Version:        3.38.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        A collection of GSettings schemas
 
 License:        LGPLv2+
@@ -10,6 +10,9 @@ License:        LGPLv2+
 URL:            https://gitlab.gnome.org/GNOME/gsettings-desktop-schemas
 Source0:        https://download.gnome.org/sources/%{name}/3.38/%{name}-%{version}.tar.xz
 
+# Adds a new key that GNOME Shell/mutter 40 alpha expect to exist
+Patch0:         0001-schemas-add-a-scroll-button-locking-to-the-trackball.patch
+
 BuildRequires:  gettext
 BuildRequires:  glib2-devel >= 2.31.0
 BuildRequires:  gobject-introspection-devel
@@ -71,6 +74,9 @@ glib-compile-schemas --dry-run --strict %{buildroot}%{_datadir}/glib-2.0/schemas
 
 
 %changelog
+* Thu Dec 03 2020 Adam Williamson <awilliam@redhat.com> - 3.38.0-2
+- Backport an upstream addition of a key GNOME Shell 40 alpha expects
+
 * Mon Sep 14 2020 Kalev Lember <klember@redhat.com> - 3.38.0-1
 - Update to 3.38.0