diff --git a/lcl/include/taskdialog.inc b/lcl/include/taskdialog.inc
index b91119f28e..6c60d70b32 100644
--- a/lcl/include/taskdialog.inc
+++ b/lcl/include/taskdialog.inc
@@ -147,7 +147,7 @@ begin
   FQueryResult := '';
   ButtonID := TWSTaskDialogClass(WidgetSetClass).Execute(Self, ParentWnd, ARadioRes);
   FModalResult := ButtonIDToModalResult(ButtonID);
-  Result := (ButtonID >= 0);
+  Result := (ButtonID >= 0) and (ModalResult <> mrCancel);
   if (ARadioRes >= TaskDialogFirstRadioButtonIndex) and (aRadioRes-TaskDialogFirstRadioButtonIndex < RadioButtons.Count) then
     FRadioButton := RadioButtons[ARadioRes-TaskDialogFirstRadioButtonIndex] as TTaskDialogRadioButtonItem
   else