diff --git a/runners/windows/windowsrunner.cpp b/runners/windows/windowsrunner.cpp
--- a/runners/windows/windowsrunner.cpp
+++ b/runners/windows/windowsrunner.cpp
@@ -336,9 +336,13 @@
     const QStringList parts = match.data().toString().split(QLatin1Char('_'));
     WindowAction action = WindowAction(parts[0].toInt());
     WId w(parts[1].toULong());
-    //this is needed since KWindowInfo() doesn't exist, m_windows[w] doesn't work
-    QHash<WId, KWindowInfo>::iterator i = m_windows.find(w);
-    KWindowInfo info = i.value();
+
+    KWindowInfo info(w, NET::WMWindowType | NET::WMDesktop | NET::WMState | NET::XAWMState | NET::WMName,
+                     NET::WM2WindowClass | NET::WM2WindowRole | NET::WM2AllowedActions);
+    if (!info.valid()) {
+        return;
+    }
+
     switch (action) {
     case ActivateAction:
         KWindowSystem::forceActiveWindow(w);