diff --git a/applets/pager/plugin/windowmodel.cpp b/applets/pager/plugin/windowmodel.cpp
--- a/applets/pager/plugin/windowmodel.cpp
+++ b/applets/pager/plugin/windowmodel.cpp
@@ -36,6 +36,7 @@
 {
 public:
     Private(WindowModel *q);
+    QRect screenGeometry() const;
 
     PagerModel *pagerModel = nullptr;
 
@@ -76,8 +77,7 @@
 {
     if (role == AbstractTasksModel::Geometry) {
         QRect windowGeo = TaskFilterProxyModel::data(index, role).toRect();
-        QList<QScreen *> screens = QGuiApplication::screens();
-        const QRect desktopGeo = screens.at(0)->geometry();
+        const QRect desktopGeo = d->screenGeometry();
 
         if (KWindowSystem::mapViewport()) {
             int x = windowGeo.center().x() % desktopGeo.width();
@@ -145,3 +145,12 @@
         emit dataChanged(index(0, 0), index(rowCount() - 1, 0), QVector<int>{StackingOrder});
     }
 }
+
+QRect WindowModel::Private::screenGeometry() const
+{
+    QRegion geometry;
+    for (auto screen: qApp->screens()) {
+        geometry += screen->geometry();
+    }
+    return geometry.boundingRect();
+}