diff --git a/src/nfcsettings.cpp b/src/nfcsettings.cpp
index 02849a3..10bb465 100644
--- a/src/nfcsettings.cpp
+++ b/src/nfcsettings.cpp
@@ -38,6 +38,7 @@
 
 NfcSettings::NfcSettings(QObject *parent)
     : QObject(parent)
+    , m_valid(false)
     , m_enabled(false)
     , m_available(false)
 {
@@ -67,6 +68,11 @@ NfcSettings::~NfcSettings()
 {
 }
 
+bool NfcSettings::valid() const
+{
+    return m_valid;
+}
+
 bool NfcSettings::available() const
 {
     return m_available;
@@ -89,6 +95,8 @@ void NfcSettings::getEnableStateFinished(QDBusPendingCallWatcher *call)
         qWarning() << "Get dbus error:" << reply.error();
     } else {
         updateEnabledState(reply.value());
+        m_valid = true;
+        emit validChanged();
     }
     call->deleteLater();
 }
diff --git a/src/nfcsettings.h b/src/nfcsettings.h
index c3adf1e..642a296 100644
--- a/src/nfcsettings.h
+++ b/src/nfcsettings.h
@@ -11,22 +11,26 @@
 class SYSTEMSETTINGS_EXPORT NfcSettings : public QObject
 {
     Q_OBJECT
-
+    Q_PROPERTY(bool valid READ valid NOTIFY validChanged)
     Q_PROPERTY(bool available READ available NOTIFY availableChanged)
     Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged)
+
 public:
     explicit NfcSettings(QObject *parent = nullptr);
     ~NfcSettings();
 
+    bool valid() const;
     bool available() const;
     bool enabled() const;
     void setEnabled(bool enabled);
 
 signals:
+    void validChanged();
     void availableChanged();
     void enabledChanged();
 
 private:
+    bool m_valid;
     bool m_enabled;
     bool m_available;
     QDBusInterface *m_interface;