diff --git a/core/polkitqt1-authority.cpp b/core/polkitqt1-authority.cpp
index f134ca686f3f897e83c37b1715965696618dfc85..1ac2d6ce66ec9a4606da91d7d14f31e19b8fcf81 100644
--- a/core/polkitqt1-authority.cpp
+++ b/core/polkitqt1-authority.cpp
@@ -25,6 +25,7 @@
 
 #include <QtDBus/QDBusInterface>
 #include <QtDBus/QDBusReply>
+#include <QtDBus/QDBusConnectionInterface>
 
 #include <polkit/polkit.h>
 
@@ -254,6 +255,8 @@ void Authority::Private::seatSignalsConnect(const QString &seat)
 
 void Authority::Private::dbusSignalAdd(const QString &service, const QString &path, const QString &interface, const QString &name)
 {
+    if (!QDBusConnection::systemBus().interface()->isServiceRegistered(service))
+        return;
     // FIXME: This code seems to be nonfunctional - it needs to be fixed somewhere (is it Qt BUG?)
     QDBusConnection::systemBus().connect(service, path, interface, name,
                                          q, SLOT(dbusFilter(QDBusMessage)));