diff --git a/mods/ITEMS/mcl_core/functions.lua b/mods/ITEMS/mcl_core/functions.lua
index b7623bf11..ad2346dd9 100644
--- a/mods/ITEMS/mcl_core/functions.lua
+++ b/mods/ITEMS/mcl_core/functions.lua
@@ -1581,7 +1581,7 @@ end
 -- MUST NOT be called if there is a snow cover node above pos.
 function mcl_core.clear_snow_dirt(pos, node)
 	local def = minetest.registered_nodes[node.name]
-	if def._mcl_snowless then
+	if def and def._mcl_snowless then
 		minetest.swap_node(pos, {name = def._mcl_snowless, param2=node.param2})
 	end
 end
@@ -1602,7 +1602,7 @@ function mcl_core.on_snowable_construct(pos)
 	-- Make snowed if needed
 	if minetest.get_item_group(anode.name, "snow_cover") == 1 then
 		local def = minetest.registered_nodes[node.name]
-		if def._mcl_snowed then
+		if def and def._mcl_snowed then
 			minetest.swap_node(pos, {name = def._mcl_snowed, param2=node.param2})
 		end
 	end
@@ -1623,7 +1623,7 @@ function mcl_core.on_snow_construct(pos)
 	local npos = {x=pos.x, y=pos.y-1, z=pos.z}
 	local node = minetest.get_node(npos)
 	local def = minetest.registered_nodes[node.name]
-	if def._mcl_snowed then
+	if def and def._mcl_snowed then
 		minetest.swap_node(npos, {name = def._mcl_snowed, param2=node.param2})
 	end
 end