diff --git a/libukui-notification/notification-settings/notification-global-settings.cpp b/libukui-notification/notification-settings/notification-global-settings.cpp
index e6614a4..ca97466 100644
--- a/libukui-notification/notification-settings/notification-global-settings.cpp
+++ b/libukui-notification/notification-settings/notification-global-settings.cpp
@@ -22,6 +22,7 @@
 #include <QQmlEngine>
 #include <QDBusInterface>
 #include <QDBusReply>
+#include <QDBusMessage>
 #include <QDebug>
 #include "settings-manager.h"
 #include "settings-properties.h"
@@ -193,7 +194,14 @@ bool NotificationGlobalSettings::isDND() {
     }
     if(!dnd) {
         if(DNDWhileFullScreen()) {
-            //todo
+            QDBusMessage msg = QDBusMessage::createMethodCall(QStringLiteral("org.kde.KWin"),
+                                                              QStringLiteral("/KWin"),
+                                                              QStringLiteral("org.kde.KWin"),
+                                                              QStringLiteral("haveFullScreenActiveWindow"));
+            QDBusReply<bool> reply  = QDBusConnection::sessionBus().call(msg);
+            if(reply.isValid()) {
+                dnd = reply.value();
+            }
         }
     }
     return dnd;