diff --git a/src/blackmisc/sharedstate/dbus/hub.h b/src/blackmisc/sharedstate/dbus/hub.h
index 581c85b40..5db4641eb 100644
--- a/src/blackmisc/sharedstate/dbus/hub.h
+++ b/src/blackmisc/sharedstate/dbus/hub.h
@@ -45,7 +45,7 @@ namespace BlackMisc
             virtual bool isConnected() const = 0;
 
             //! Get a duplex object for the calling process.
-            virtual std::pair<QSharedPointer<IDuplex>, QFuture<void>> getDuplex(const CIdentifier &) = 0;
+            virtual std::pair<QSharedPointer<IDuplex>, QFuture<bool>> getDuplex(const CIdentifier &) = 0;
 
         public slots:
             //! Create a duplex object for the identified process.
@@ -56,7 +56,7 @@ namespace BlackMisc
 
         protected:
             //! Create a duplex object and return status via future.
-            virtual QFuture<void> openDuplexAsync(const CIdentifier &client) = 0;
+            virtual QFuture<bool> openDuplexAsync(const CIdentifier &client) = 0;
 
             //! Constructor.
             IHub(QObject *parent = nullptr);
diff --git a/src/blackmisc/sharedstate/dbus/hubimpl.cpp b/src/blackmisc/sharedstate/dbus/hubimpl.cpp
index cce0e7b8d..d3ea65ca4 100644
--- a/src/blackmisc/sharedstate/dbus/hubimpl.cpp
+++ b/src/blackmisc/sharedstate/dbus/hubimpl.cpp
@@ -15,7 +15,7 @@ namespace BlackMisc::SharedState::DBus
         if (server) { server->addObject(BLACKMISC_HUB_PATH, this); }
     }
 
-    std::pair<QSharedPointer<IDuplex>, QFuture<void>> CHub::getDuplex(const CIdentifier &identifier)
+    std::pair<QSharedPointer<IDuplex>, QFuture<bool>> CHub::getDuplex(const CIdentifier &identifier)
     {
         auto future = openDuplexAsync(identifier);
         return std::make_pair(m_clients.value(identifier), future);
@@ -37,12 +37,12 @@ namespace BlackMisc::SharedState::DBus
         m_clients.take(client);
     }
 
-    QFuture<void> CHub::openDuplexAsync(const CIdentifier &client)
+    QFuture<bool> CHub::openDuplexAsync(const CIdentifier &client)
     {
         openDuplex(client);
 
-        CPromise<void> promise;
-        promise.setResult();
+        CPromise<bool> promise;
+        promise.setResult(true);
         return promise.future();
     }
 
diff --git a/src/blackmisc/sharedstate/dbus/hubimpl.h b/src/blackmisc/sharedstate/dbus/hubimpl.h
index 85df7a4de..67bfe2040 100644
--- a/src/blackmisc/sharedstate/dbus/hubimpl.h
+++ b/src/blackmisc/sharedstate/dbus/hubimpl.h
@@ -40,7 +40,7 @@ namespace BlackMisc
             //! \name Interface implementations
             //! @{
             virtual bool isConnected() const override { return true; }
-            virtual std::pair<QSharedPointer<IDuplex>, QFuture<void>> getDuplex(const CIdentifier &) override;
+            virtual std::pair<QSharedPointer<IDuplex>, QFuture<bool>> getDuplex(const CIdentifier &) override;
             //! @}
 
         public slots:
@@ -57,7 +57,7 @@ namespace BlackMisc
         protected:
             //! \name Interface implementations
             //! @{
-            virtual QFuture<void> openDuplexAsync(const CIdentifier &client) override;
+            virtual QFuture<bool> openDuplexAsync(const CIdentifier &client) override;
             //! @}
 
         private:
diff --git a/src/blackmisc/sharedstate/dbus/hubproxy.cpp b/src/blackmisc/sharedstate/dbus/hubproxy.cpp
index e25062a6a..0e8e0eb60 100644
--- a/src/blackmisc/sharedstate/dbus/hubproxy.cpp
+++ b/src/blackmisc/sharedstate/dbus/hubproxy.cpp
@@ -22,7 +22,7 @@ namespace BlackMisc::SharedState::DBus
         return m_interface->isValid();
     }
 
-    std::pair<QSharedPointer<IDuplex>, QFuture<void>> CHubProxy::getDuplex(const CIdentifier &identifier)
+    std::pair<QSharedPointer<IDuplex>, QFuture<bool>> CHubProxy::getDuplex(const CIdentifier &identifier)
     {
         auto duplex = QSharedPointer<CDuplexProxy>::create(m_interface->connection(), m_service, this);
         connect(duplex.get(), &QObject::destroyed, this, [=] { closeDuplex(identifier); });
@@ -39,7 +39,7 @@ namespace BlackMisc::SharedState::DBus
         m_interface->callDBus(QLatin1String("closeDuplex"), client);
     }
 
-    QFuture<void> CHubProxy::openDuplexAsync(const CIdentifier &client)
+    QFuture<bool> CHubProxy::openDuplexAsync(const CIdentifier &client)
     {
         return m_interface->callDBusFuture<bool>(QLatin1String("openDuplex"), client);
     }
diff --git a/src/blackmisc/sharedstate/dbus/hubproxy.h b/src/blackmisc/sharedstate/dbus/hubproxy.h
index bd5acbd2e..3fbdcac6a 100644
--- a/src/blackmisc/sharedstate/dbus/hubproxy.h
+++ b/src/blackmisc/sharedstate/dbus/hubproxy.h
@@ -33,7 +33,7 @@ namespace BlackMisc
             //! \name Interface implementations
             //! @{
             virtual bool isConnected() const override;
-            virtual std::pair<QSharedPointer<IDuplex>, QFuture<void>> getDuplex(const CIdentifier &) override;
+            virtual std::pair<QSharedPointer<IDuplex>, QFuture<bool>> getDuplex(const CIdentifier &) override;
             //! @}
 
         public slots:
@@ -50,7 +50,7 @@ namespace BlackMisc
         protected:
             //! \name Interface implementations
             //! @{
-            virtual QFuture<void> openDuplexAsync(const CIdentifier &client) override;
+            virtual QFuture<bool> openDuplexAsync(const CIdentifier &client) override;
             //! @}
 
         private: