diff --git a/init.lua b/init.lua
index a6af3bb..c925325 100644
--- a/init.lua
+++ b/init.lua
@@ -85,7 +85,7 @@ kotatsu_table.pos_check = {
 kotatsu_table.register_table = function(name, desc, base, tiles, top, top_tiles, inv_image)
 	base = base or "wool:white" --Seriously, though, don't omit base...
 	tiles = tiles or (minetest.registered_nodes[base] or {tiles={"wool_white.png"}}).tiles
-	top = top or "default:wood"
+	top = top or "group:wood"
 	top_tiles = top_tiles or (minetest.registered_nodes[top] or {tiles={"default_wood.png"}}).tiles
 	inv_image = inv_image or "(kotatsu_base.png^[mask:"..tiles[1]..")^(kotatsu_top.png^[mask:"..top_tiles[1]..")"
 	local kotatsu = name or ("kotatsu_table:table_"..string.gsub(base, ":", "_"))