diff --git a/pkgs/desktops/lomiri/data/lomiri-session/1001-Unset-QT_QPA_PLATFORMTHEME.patch b/pkgs/desktops/lomiri/data/lomiri-session/1001-Unset-QT_QPA_PLATFORMTHEME.patch
new file mode 100644
index 000000000000..8edf093d4ed3
--- /dev/null
+++ b/pkgs/desktops/lomiri/data/lomiri-session/1001-Unset-QT_QPA_PLATFORMTHEME.patch
@@ -0,0 +1,33 @@
+From 30b5391c3f20180fe7427fe179ba26f846200d96 Mon Sep 17 00:00:00 2001
+From: OPNA2608 <opna2608@protonmail.com>
+Date: Mon, 3 Jun 2024 20:50:03 +0200
+Subject: [PATCH] Unset QT_QPA_PLATFORMTHEME
+
+gtk3 value breaks Lomiri startup
+---
+ lomiri-session | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/lomiri-session b/lomiri-session
+index 9d68249..b103840 100755
+--- a/lomiri-session
++++ b/lomiri-session
+@@ -47,6 +47,7 @@ fi
+ 
+ # Set some envs
+ export QT_QPA_PLATFORM=wayland
++export QT_QPA_PLATFORMTHEME=
+ export QT_IM_MODULE=maliit
+ export MALIIT_FORCE_DBUS_CONNECTION=1
+ export UITK_ICON_THEME=suru
+@@ -55,6 +56,7 @@ dbus-update-activation-environment --systemd MALIIT_FORCE_DBUS_CONNECTION=1
+ dbus-update-activation-environment --systemd QT_IM_MODULE=maliit
+ dbus-update-activation-environment --systemd GTK_IM_MODULE=maliit
+ dbus-update-activation-environment --systemd QT_QPA_PLATFORM=wayland
++dbus-update-activation-environment --systemd QT_QPA_PLATFORMTHEME=
+ dbus-update-activation-environment --systemd SDL_VIDEODRIVER=wayland
+ dbus-update-activation-environment --systemd QT_WAYLAND_DISABLE_WINDOWDECORATION=1
+ dbus-update-activation-environment --systemd QT_ACCESSIBILITY=1
+-- 
+2.44.1
+
diff --git a/pkgs/desktops/lomiri/data/lomiri-session/default.nix b/pkgs/desktops/lomiri/data/lomiri-session/default.nix
index c62e4ab572bd..351aed9de824 100644
--- a/pkgs/desktops/lomiri/data/lomiri-session/default.nix
+++ b/pkgs/desktops/lomiri/data/lomiri-session/default.nix
@@ -135,6 +135,8 @@ stdenvNoCC.mkDerivation (finalAttrs: {
       excludes = [ "systemd/lomiri.service" ];
       hash = "sha256-BICb6ZwU/sUBzmM4udsOndIgw1A03I/UEG000YvMZ9Y=";
     })
+
+    ./1001-Unset-QT_QPA_PLATFORMTHEME.patch
   ];
 
   postPatch = ''