diff --git a/qml/ArchiveProgressDialog.qml b/qml/ArchiveProgressDialog.qml
index aa8a596..f50ff13 100644
--- a/qml/ArchiveProgressDialog.qml
+++ b/qml/ArchiveProgressDialog.qml
@@ -9,7 +9,9 @@ FishUI.Window {
     id: control
 
     property QtObject archiveModel
-    property Window hostWindow
+    // Not `Window`: that is QtQuick.Window's own type, and the desktop's host
+    // window is a QQuickWindow subclass from C++, which is not one.
+    property QtObject hostWindow
 
     flags: Qt.Dialog | Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint
     modality: Qt.NonModal