diff --git a/mods/mobs/dungeonmaster.lua b/mods/mobs/dungeonmaster.lua
index 1ab7bda8..891ba3c6 100755
--- a/mods/mobs/dungeonmaster.lua
+++ b/mods/mobs/dungeonmaster.lua
@@ -2,7 +2,7 @@
 -- Dungeon Master by PilzAdam
 
 -- Node which cannot be destroyed by DungeonMasters' fireballs
-local excluded = {"nether:netherrack","default:obsidian_glass","default:obsidian","default:bedrock", "doors:door_steel_b_1", "doors:door_steel_t_1", "doors:door_steel_b_2", "doors:door_steel_t_2","default:chest_locked"}
+local excluded = {"nether:netherrack","default:obsidian_glass","default:obsidian", "default:obsidian_cooled", "default:bedrock", "doors:door_steel_b_1", "doors:door_steel_t_1", "doors:door_steel_b_2", "doors:door_steel_t_2","default:chest_locked"}
 
 mobs:register_mob("mobs:dungeon_master", {
 	-- animal, monster, npc, barbarian