diff --git a/dde-license-dialog/src/mainwindow.cpp b/dde-license-dialog/src/mainwindow.cpp
index 6df4f67d..df65a959 100644
--- a/dde-license-dialog/src/mainwindow.cpp
+++ b/dde-license-dialog/src/mainwindow.cpp
@@ -26,7 +26,7 @@ MainWindow::MainWindow(QWidget *parent)
     if (bWayland) {
         setWindowFlags(windowFlags() | Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);
     } else {
-        setWindowFlags(windowFlags() | Qt::WindowStaysOnTopHint);
+        setWindowFlags(windowFlags() | Qt::WindowStaysOnTopHint | Qt::Tool);
     }
 
     setAccessibleName("MainWindow");