diff --git a/mods/ENTITIES/mcl_mobs/api.lua b/mods/ENTITIES/mcl_mobs/api.lua
index 14b58bc119..3940039573 100644
--- a/mods/ENTITIES/mcl_mobs/api.lua
+++ b/mods/ENTITIES/mcl_mobs/api.lua
@@ -1329,7 +1329,8 @@ local do_jump = function(self)
 	end
 
 	if self.walk_chance == 0
-	or minetest.registered_items[nod.name].walkable then
+	local ndef = minetest.registered_nodes[nod.name]
+	or ndef and ndef.walkable then
 
 		if minetest.get_item_group(nod.name, "fence") == 0
 		and minetest.get_item_group(nod.name, "fence_gate") == 0