diff --git a/YACReaderLibrary/yacreader_navigation_controller.cpp b/YACReaderLibrary/yacreader_navigation_controller.cpp
index 9a313583..0d4e90eb 100644
--- a/YACReaderLibrary/yacreader_navigation_controller.cpp
+++ b/YACReaderLibrary/yacreader_navigation_controller.cpp
@@ -271,6 +271,7 @@ void YACReaderNavigationController::loadPreviousStatus()
 
 void YACReaderNavigationController::setupConnections()
 {
+    // we need YACReaderTreeView::currentIndexChanged to be able to navigate the folders tree using the keyboard cursors
     connect(libraryWindow->foldersView, &YACReaderTreeView::currentIndexChanged, this, &YACReaderNavigationController::selectedFolder);
     connect(libraryWindow->foldersView, &YACReaderTreeView::clicked, this, &YACReaderNavigationController::selectedFolder);
     connect(libraryWindow->listsView, &QAbstractItemView::clicked, this, &YACReaderNavigationController::selectedList);