diff --git a/abstract_client.cpp b/abstract_client.cpp
--- a/abstract_client.cpp
+++ b/abstract_client.cpp
@@ -37,6 +37,8 @@
 #include "workspace.h"
 
 #include "wayland_server.h"
+#include <KWayland/Server/clientconnection.h>
+#include <KWayland/Server/surface_interface.h>
 #include <KWayland/Server/plasmawindowmanagement_interface.h>
 
 #include <KDecoration2/Decoration>
@@ -703,7 +705,8 @@
         w->setAppId(QString::fromUtf8(m_desktopFileName.isEmpty() ? resourceName() : m_desktopFileName));
     };
     updateAppId();
-    w->setSkipTaskbar(skipTaskbar());
+    w->setPid(surface()->client()->processId());
+    surface()->client()->processId();
     w->setShadeable(isShadeable());
     w->setShaded(isShade());
     w->setResizable(isResizable());