diff --git a/debian/changelog b/debian/changelog
index b3cd21c..8cb3990 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+sudo (1.9.9-1ubuntu2.1) jammy; urgency=medium
+
+  * Add XDG_CURRENT_DESKTOP to initial_keepenv_table for Qt to determine the
+    correct theme (LP: #1958055)
+
+ -- Benjamin Drung <bdrung@ubuntu.com>  Thu, 04 Aug 2022 12:35:21 +0200
+
 sudo (1.9.9-1ubuntu2) jammy; urgency=medium
 
   * d/t/control: skip 03-getroot-ldap autopkgtest on non-containers
diff --git a/debian/patches/Add-XDG_CURRENT_DESKTOP-to-initial_keepenv_table.patch b/debian/patches/Add-XDG_CURRENT_DESKTOP-to-initial_keepenv_table.patch
new file mode 100644
index 0000000..dfe28d6
--- /dev/null
+++ b/debian/patches/Add-XDG_CURRENT_DESKTOP-to-initial_keepenv_table.patch
@@ -0,0 +1,29 @@
+From: Benjamin Drung <bdrung@ubuntu.com>
+Date: Fri, 29 Jul 2022 11:35:47 +0200
+Subject: Add XDG_CURRENT_DESKTOP to initial_keepenv_table
+
+Qt needs `XDG_CURRENT_DESKTOP` to be set to determine the correct theme.
+
+Since `DISPLAY` and `XAUTHORITY` are already in the default table of
+variables to preserve in the environment, just add `XDG_CURRENT_DESKTOP`
+to it.
+
+Bug: https://launchpad.net/bugs/1958055
+Forwarded: https://github.com/sudo-project/sudo/pull/165
+Signed-off-by: Benjamin Drung <bdrung@ubuntu.com>
+---
+ plugins/sudoers/env.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/plugins/sudoers/env.c b/plugins/sudoers/env.c
+index f20515f..b1f47d1 100644
+--- a/plugins/sudoers/env.c
++++ b/plugins/sudoers/env.c
+@@ -225,6 +225,7 @@ static const char *initial_keepenv_table[] = {
+     "PS2",
+     "XAUTHORITY",
+     "XAUTHORIZATION",
++    "XDG_CURRENT_DESKTOP",
+     NULL
+ };
+ 
diff --git a/debian/patches/series b/debian/patches/series
index a596915..56d9f4c 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -1,3 +1,4 @@
 paths-in-samples.diff
 Whitelist-DPKG_COLORS-environment-variable.diff
 sudo-ldap-docs
+Add-XDG_CURRENT_DESKTOP-to-initial_keepenv_table.patch