diff --git a/src/xdgshellclient.cpp b/src/xdgshellclient.cpp
index b321a02a23..6e0798ac98 100644
--- a/src/xdgshellclient.cpp
+++ b/src/xdgshellclient.cpp
@@ -1173,6 +1173,7 @@ void XdgToplevelClient::initialize()
         moveResize(rules()->checkGeometry(frameGeometry(), true));
         maximize(rules()->checkMaximize(initialMaximizeMode(), true));
         setFullScreen(rules()->checkFullScreen(initialFullScreenMode(), true), false);
+        setOnActivities(rules()->checkActivity(activities(), true));
         setDesktop(rules()->checkDesktop(desktop(), true));
         setDesktopFileName(rules()->checkDesktopFile(desktopFileName(), true).toUtf8());
         if (rules()->checkMinimize(isMinimized(), true)) {