diff --git a/src/SMESHGUI/SMESHGUI.cxx b/src/SMESHGUI/SMESHGUI.cxx
index 8f7c64131..9e70d965d 100644
--- a/src/SMESHGUI/SMESHGUI.cxx
+++ b/src/SMESHGUI/SMESHGUI.cxx
@@ -4771,6 +4771,7 @@ LightApp_Selection* SMESHGUI::createSelection() const
 void SMESHGUI::windows( QMap<int, int>& aMap ) const
 {
   aMap.insert( SalomeApp_Application::WT_ObjectBrowser, Qt::LeftDockWidgetArea );
+  aMap.insert( SalomeApp_Application::WT_NoteBook, Qt::LeftDockWidgetArea );
   aMap.insert( SalomeApp_Application::WT_PyConsole, Qt::BottomDockWidgetArea );
 }