diff --git a/mobs/mese_dragon.lua b/mobs/mese_dragon.lua
index cb7a076..59a36ea 100644
--- a/mobs/mese_dragon.lua
+++ b/mobs/mese_dragon.lua
@@ -75,6 +75,9 @@ mobs:register_mob("nssm:mese_dragon", {
 			self.attack_rip = self.attack_rip+1
 
 			local s = self.object:getpos()
+			if minetest.is_protected(s, "") then
+				return
+			end
 			local p = self.attack:getpos()
 
 			p.y = p.y + 1.5
diff --git a/nssm_api.lua b/nssm_api.lua
index a33225b..1cf8819 100644
--- a/nssm_api.lua
+++ b/nssm_api.lua
@@ -345,10 +345,8 @@ function digging_attack(
 		dir = vector.normalize(dir)
 		local per = perpendicular_vector(dir)
 
-
 		local posp = vector.add(s,dir)
 
-
 		--minetest.chat_send_all("La mia posizione:"..minetest.pos_to_string(s))
 		--minetest.chat_send_all("La posizione davanti:"..minetest.pos_to_string(posp))
 		posp = vector.subtract(posp,per)