diff --git a/mods/default/functions.lua b/mods/default/functions.lua
index 11156bf9..e3298720 100644
--- a/mods/default/functions.lua
+++ b/mods/default/functions.lua
@@ -300,7 +300,7 @@ function default.dig_up(pos, node, digger, max_height)
 	max_height = max_height or 100
 
 	for y = pos.y + 1, pos.y + max_height do
-		local up_pos  = { x = pos.x, y = y, z = pos.z}
+		local up_pos  = vector.new(pos.x, y, pos.z)
 		local up_node = minetest.get_node(up_pos)
 		if up_node.name == node.name then
 			in_dig_up = true