diff --git a/src/app/cli/Cli.cpp b/src/app/cli/Cli.cpp
index ce77c3e78..ede8a5d14 100644
--- a/src/app/cli/Cli.cpp
+++ b/src/app/cli/Cli.cpp
@@ -125,8 +125,11 @@ static void cliInitiateConference (QHash<QString, QString> &args) {
   const QString id = args["conference-id"];
 
   auto updateCallsWindow = []() {
-    // TODO: Set the view to the "waiting call view".
     QQuickWindow *callsWindow = App::getInstance()->getCallsWindow();
+    if (!callsWindow)
+      return;
+
+    // TODO: Set the view to the "waiting call view".
     if (CoreManager::getInstance()->getSettingsModel()->getKeepCallsWindowInBackground()) {
       if (!callsWindow->isVisible())
         callsWindow->showMinimized();
diff --git a/src/components/call/CallModel.cpp b/src/components/call/CallModel.cpp
index 06a656845..18ad3a618 100644
--- a/src/components/call/CallModel.cpp
+++ b/src/components/call/CallModel.cpp
@@ -339,12 +339,13 @@ void CallModel::accept (bool withVideo) {
   setRecordFile(params);
 
   QQuickWindow *callsWindow = App::getInstance()->getCallsWindow();
-  if (coreManager->getSettingsModel()->getKeepCallsWindowInBackground()) {
-    if (!callsWindow->isVisible())
-      callsWindow->showMinimized();
-  } else
-    App::smartShowWindow(callsWindow);
-
+  if (callsWindow) {
+    if (coreManager->getSettingsModel()->getKeepCallsWindowInBackground()) {
+      if (!callsWindow->isVisible())
+        callsWindow->showMinimized();
+    } else
+      App::smartShowWindow(callsWindow);
+  }
   mCall->acceptWithParams(params);
 }
 
diff --git a/src/components/calls/CallsListModel.cpp b/src/components/calls/CallsListModel.cpp
index 60db77228..76688a137 100644
--- a/src/components/calls/CallsListModel.cpp
+++ b/src/components/calls/CallsListModel.cpp
@@ -230,11 +230,13 @@ bool CallsListModel::removeRows (int row, int count, const QModelIndex &parent)
 void CallsListModel::addCall (const shared_ptr<linphone::Call> &call) {
   if (call->getDir() == linphone::CallDirOutgoing) {
     QQuickWindow *callsWindow = App::getInstance()->getCallsWindow();
-    if (CoreManager::getInstance()->getSettingsModel()->getKeepCallsWindowInBackground()) {
-      if (!callsWindow->isVisible())
-        callsWindow->showMinimized();
-    } else
-      App::smartShowWindow(callsWindow);
+    if (callsWindow) {
+      if (CoreManager::getInstance()->getSettingsModel()->getKeepCallsWindowInBackground()) {
+        if (!callsWindow->isVisible())
+          callsWindow->showMinimized();
+      } else
+        App::smartShowWindow(callsWindow);
+    }
   }
 
   CallModel *callModel = new CallModel(call);
diff --git a/src/components/chat/ChatProxyModel.cpp b/src/components/chat/ChatProxyModel.cpp
index 190c2cfd4..a71fdbeff 100644
--- a/src/components/chat/ChatProxyModel.cpp
+++ b/src/components/chat/ChatProxyModel.cpp
@@ -69,9 +69,12 @@ ChatProxyModel::ChatProxyModel (QObject *parent) : QSortFilterProxyModel(parent)
   QObject::connect(app->getMainWindow(), &QWindow::activeChanged, this, [this]() {
     handleIsActiveChanged(App::getInstance()->getMainWindow());
   });
-  QObject::connect(app->getCallsWindow(), &QWindow::activeChanged, this, [this]() {
-    handleIsActiveChanged(App::getInstance()->getCallsWindow());
-  });
+
+  QQuickWindow *callsWindow = app->getCallsWindow();
+  if (callsWindow)
+    QObject::connect(callsWindow, &QWindow::activeChanged, this, [this, callsWindow]() {
+      handleIsActiveChanged(callsWindow);
+    });
 }
 
 // -----------------------------------------------------------------------------