1 files changed, 3 insertions, 4 deletions

diff --git a/scripts/metadata_filter.lua b/scripts/metadata_filter.lua
index 3bea687..daad940 100644
--- a/scripts/metadata_filter.lua
+++ b/scripts/metadata_filter.lua
@@ -89,18 +89,17 @@ end
 
 function prep_menu(active_id, main_menu)
     local active_item = nil
+    local items = pandoc.List()
 
     for i = 1, #main_menu do
         local item = main_menu[i]
         local active = pandoc.utils.stringify(item.id) == active_id
         item.active = active
         if active then active_item = item end
+        if not item.hidden or item.active then items:insert(item) end
     end
 
-    return {
-        items = main_menu:filter(function(item) return not item.hidden or item.active end),
-        active = active_item,
-    }
+    return { items = items, active = active_item }
 end
 
 function process_pages(global, pages_by_id)