1 files changed, 1 insertions, 1 deletions
diff --git a/util.lua b/util.lua
index 354edcd..e32c16b 100644
--- a/util.lua
+++ b/util.lua
@@ -41,7 +41,7 @@ digtron.mark_diggable = function(pos, nodes_dug)
 	local target = minetest.get_node(pos)
 	
 	-- prevent digtrons from being marked for digging.
-	if minetest.get_item_group(target.name, "digtron") ~= 0 then
+	if minetest.get_item_group(target.name, "digtron") ~= 0 or minetest.get_item_group(target.name, "digtron_protected") ~= 0 then
 		return 0, {}
 	end