diff --git a/abstract_client.h b/abstract_client.h
--- a/abstract_client.h
+++ b/abstract_client.h
@@ -500,7 +500,7 @@
     /**
      * Sets the maximization according to @p vertically and @p horizontally.
      **/
-    void setMaximize(bool vertically, bool horizontally);
+    Q_INVOKABLE void setMaximize(bool vertically, bool horizontally);
     virtual bool noBorder() const = 0;
     virtual void setNoBorder(bool set) = 0;
     virtual void blockActivityUpdates(bool b = true) = 0;