diff --git a/src/frontend/mainwindow.cpp b/src/frontend/mainwindow.cpp
index 26e766b4..bf915f55 100644
--- a/src/frontend/mainwindow.cpp
+++ b/src/frontend/mainwindow.cpp
@@ -544,7 +544,7 @@ void MainWindow::getTabletMode()
         m_isShowInCenter = true;
         return;
     }
-    QDBusReply<bool> reply = interface->call("get_current_tabletmode");
+    QDBusReply<bool> reply = interface.call("get_current_tabletmode");
     if (!reply.isValid()) {
         m_isShowInCenter = true;
         return;
diff --git a/src/frontend/vpnmainwindow.cpp b/src/frontend/vpnmainwindow.cpp
index e91a5ecb..fe845a80 100644
--- a/src/frontend/vpnmainwindow.cpp
+++ b/src/frontend/vpnmainwindow.cpp
@@ -463,7 +463,7 @@ void vpnMainWindow::getTabletMode()
         m_isShowInCenter = true;
         return;
     }
-    QDBusReply<bool> reply = interface->call("get_current_tabletmode");
+    QDBusReply<bool> reply = interface.call("get_current_tabletmode");
     if (!reply.isValid()) {
         m_isShowInCenter = true;
         return;