diff --git a/lcl/interfaces/qt/qtwidgets.pas b/lcl/interfaces/qt/qtwidgets.pas
index 06c604e063..55628eba96 100644
--- a/lcl/interfaces/qt/qtwidgets.pas
+++ b/lcl/interfaces/qt/qtwidgets.pas
@@ -18261,8 +18261,10 @@ end;
 function TQtFilePreviewDialog.CreateWidget(parent: QWidgetH; f: QtWindowFlags
   ): QWidgetH;
 begin
+  {$ifndef QT_NATIVE_DIALOGS}
   FPreviewWidget := nil;
   FTextWidget := nil;
+  {$endif}
   Result := inherited CreateWidget(parent, f);
 end;
 
diff --git a/lcl/interfaces/qt/qtwsdialogs.pp b/lcl/interfaces/qt/qtwsdialogs.pp
index 3af45b2e25..87d4ea25a5 100644
--- a/lcl/interfaces/qt/qtwsdialogs.pp
+++ b/lcl/interfaces/qt/qtwsdialogs.pp
@@ -651,8 +651,9 @@ begin
     {. $note WE MUST USE NON NATIVE DIALOGS HERE, OTHERWISE NO SIGNALS #16532.}
     QFileDialog_setOption(QFileDialogH(FileDialog.Widget),
       QFileDialogDontUseNativeDialog, True);
-
+    {$ifndef QT_NATIVE_DIALOGS}
     FileDialog.initializePreview(TPreviewFileDialog(ACommonDialog).PreviewFileControl);
+    {$endif}
     FileDialog.AttachEvents;
 
     Result := THandle(FileDialog);