diff --git a/src/slic3r/GUI/GUI_ObjectList.hpp b/src/slic3r/GUI/GUI_ObjectList.hpp
index 4b99eee2b..c38ecb45c 100644
--- a/src/slic3r/GUI/GUI_ObjectList.hpp
+++ b/src/slic3r/GUI/GUI_ObjectList.hpp
@@ -1,15 +1,18 @@
 #ifndef slic3r_GUI_ObjectList_hpp_
 #define slic3r_GUI_ObjectList_hpp_
 
-#include <wx/bitmap.h>
-#include <wx/dataview.h>
 #include <map>
 #include <vector>
 
+#include <wx/bitmap.h>
+#include <wx/dataview.h>
+#include <wx/menu.h>
+
 #include "Event.hpp"
 #include "wxExtensions.hpp"
 
 class wxBoxSizer;
+class wxMenuItem;
 class PrusaObjectDataViewModel;
 
 namespace Slic3r {