diff --git a/samples/blackgui/mainwindow.h b/samples/blackgui/mainwindow.h
index 1a31e68f0..ebbd56037 100644
--- a/samples/blackgui/mainwindow.h
+++ b/samples/blackgui/mainwindow.h
@@ -79,7 +79,7 @@ protected:
 
     /*!
      * \brief Main page indexes
-     */
+     * \remarks keep the values in sync with the real tab indexes
     enum MainPageIndex
     {
         MainPageStatus = 0,