diff --git a/abstract_client.cpp b/abstract_client.cpp
--- a/abstract_client.cpp
+++ b/abstract_client.cpp
@@ -512,7 +512,7 @@
         if (m_desktops.count() > 1 && static_cast<uint>(m_desktops.count()) == VirtualDesktopManager::self()->count() - 1) {
             m_desktops.clear();
         } else {
-            m_desktops << virtualDesktop;
+            m_desktops = {virtualDesktop};
         }
     }
     if (windowManagementInterface()) {