diff --git a/modules/misc/qt.nix b/modules/misc/qt.nix
index 199865796..495841ea4 100644
--- a/modules/misc/qt.nix
+++ b/modules/misc/qt.nix
@@ -57,7 +57,7 @@ in {
 
       platformTheme = lib.mkOption {
         type = with lib.types;
-          nullOr (enum [ "gtk" "gnome" "lxqt" "qtct" "kde" ]);
+          nullOr (enum [ "gtk" "gtk3" "gnome" "lxqt" "qtct" "kde" ]);
         default = null;
         example = "gnome";
         relatedPackages = [
@@ -81,6 +81,10 @@ in {
           : Use GTK theme with
             [`qtstyleplugins`](https://github.com/qt/qtstyleplugins)
 
+          `gtk3`
+          : Use [GTK3 integration](https://github.com/qt/qtbase/tree/dev/src/plugins/platformthemes/gtk3)
+            for file picker dialogs, font and theme configuration
+
           `gnome`
           : Use GNOME theme with
             [`qgnomeplatform`](https://github.com/FedoraQt/QGnomePlatform)