diff --git a/mesecons_blinkyplant/init.lua b/mesecons_blinkyplant/init.lua
index 3bad6a7..80b6b7e 100644
--- a/mesecons_blinkyplant/init.lua
+++ b/mesecons_blinkyplant/init.lua
@@ -33,7 +33,7 @@ mesecon.register_node("mesecons_blinkyplant:blinky_plant", {
 	},
 	on_timer = on_timer,
 	on_rightclick = function(pos, node, clicker)
-		if minetest.is_protected(pos, clicker and clicker:get_player_name()) then
+		if minetest.is_protected(pos, clicker and clicker:get_player_name() or "") then
 			return
 		end
 
diff --git a/mesecons_delayer/init.lua b/mesecons_delayer/init.lua
index 66665ad..d392633 100644
--- a/mesecons_delayer/init.lua
+++ b/mesecons_delayer/init.lua
@@ -93,7 +93,7 @@ local off_state = {
 	wield_image = "mesecons_delayer_off_1.png",
 	groups = off_groups,
 	on_punch = function(pos, node, puncher)
-		if minetest.is_protected(pos, puncher and puncher:get_player_name()) then
+		if minetest.is_protected(pos, puncher and puncher:get_player_name() or "") then
 			return
 		end
 
@@ -134,7 +134,7 @@ local on_state = {
 	},
 	groups = {bendy = 2, snappy = 1, dig_immediate = 2, not_in_creative_inventory = 1},
 	on_punch = function(pos, node, puncher)
-		if minetest.is_protected(pos, puncher and puncher:get_player_name()) then
+		if minetest.is_protected(pos, puncher and puncher:get_player_name() or "") then
 			return
 		end
 
diff --git a/mesecons_noteblock/init.lua b/mesecons_noteblock/init.lua
index 577cee0..40e2577 100644
--- a/mesecons_noteblock/init.lua
+++ b/mesecons_noteblock/init.lua
@@ -4,7 +4,7 @@ minetest.register_node("mesecons_noteblock:noteblock", {
 	is_ground_content = false,
 	groups = {snappy=2, choppy=2, oddly_breakable_by_hand=2},
 	on_punch = function(pos, node, puncher) -- change sound when punched
-		if minetest.is_protected(pos, puncher and puncher:get_player_name()) then
+		if minetest.is_protected(pos, puncher and puncher:get_player_name() or "") then
 			return
 		end