diff --git a/client.h b/client.h
index c92e6eff86..3e84d1db17 100644
--- a/client.h
+++ b/client.h
@@ -90,6 +90,10 @@ class Client
      * The desktop this Client is on. If the Client is on all desktops the property has value -1.
      **/
     Q_PROPERTY(int desktop READ desktop WRITE setDesktop NOTIFY desktopChanged)
+    /**
+     * Whether the Client is on all desktops. That is desktop is -1.
+     **/
+    Q_PROPERTY(bool onAllDesktops READ isOnAllDesktops WRITE setOnAllDesktops NOTIFY desktopChanged)
     /**
      * Whether this Client is fullScreen. A Client might either be fullScreen due to the _NET_WM property
      * or through a legacy support hack. The fullScreen state can only be changed if the Client does not
diff --git a/toplevel.h b/toplevel.h
index 5f189ff56b..aba932141c 100644
--- a/toplevel.h
+++ b/toplevel.h
@@ -60,6 +60,10 @@ class Toplevel
     Q_PROPERTY(int x READ x)
     Q_PROPERTY(int y READ y)
     Q_PROPERTY(int desktop READ desktop)
+    /**
+     * Whether the window is on all desktops. That is desktop is -1.
+     **/
+    Q_PROPERTY(bool onAllDesktops READ isOnAllDesktops)
     Q_PROPERTY(QRect rect READ rect)
     Q_PROPERTY(QPoint clientPos READ clientPos)
     Q_PROPERTY(QSize clientSize READ clientSize)