diff --git a/gtk/gtkmenuitem.h b/gtk/gtkmenuitem.h
index b1c9684aab..422706a2af 100644
--- a/gtk/gtkmenuitem.h
+++ b/gtk/gtkmenuitem.h
@@ -99,11 +99,7 @@ struct _GtkMenuItemClass
 
   /*< private >*/
 
-  /* Padding for future expansion */
-  void (*_gtk_reserved1) (void);
-  void (*_gtk_reserved2) (void);
-  void (*_gtk_reserved3) (void);
-  void (*_gtk_reserved4) (void);
+  gpointer padding[8];
 };