diff --git a/abstract_client.h b/abstract_client.h
--- a/abstract_client.h
+++ b/abstract_client.h
@@ -430,6 +430,11 @@
     void setDesktop(int);
     void enterDesktop(VirtualDesktop *desktop);
     void leaveDesktop(VirtualDesktop *desktop);
+
+    /**
+     * Set the window as being on the attached list of desktops
+     * On X11 it will be set to the last entry
+     */
     void setDesktops(QVector<VirtualDesktop *> desktops);
 
     int desktop() const override {
diff --git a/abstract_client.cpp b/abstract_client.cpp
--- a/abstract_client.cpp
+++ b/abstract_client.cpp
@@ -501,7 +501,7 @@
 {
     //on x11 we can have only one desktop at a time
     if (kwinApp()->operationMode() == Application::OperationModeX11 && desktops.size() > 1) {
-        desktops = QVector<VirtualDesktop*>({desktops.first()});
+        desktops = QVector<VirtualDesktop*>({desktops.last()});
     }
 
     if (desktops == m_desktops) {