diff --git a/mods/mobs/dog.lua b/mods/mobs/dog.lua
index 4f9e2eaa..68a9e7f3 100755
--- a/mods/mobs/dog.lua
+++ b/mods/mobs/dog.lua
@@ -37,6 +37,8 @@ mobs:register_mob("mobs:dog", {
 	light_damage = 0,
 	on_rightclick = function(self, clicker)
 		local item = clicker:get_wielded_item()
+		local name = clicker:get_player_name()
+		if not name then return end
 		if item:get_name() == "mobs:meat_raw" then
 			local hp = self.object:get_hp()
 			-- return if full health
diff --git a/mods/mobs/npc.lua b/mods/mobs/npc.lua
index 8a623fc8..e6e21db0 100755
--- a/mods/mobs/npc.lua
+++ b/mods/mobs/npc.lua
@@ -67,7 +67,7 @@ mobs:register_mob("mobs:npc", {
 	on_rightclick = function(self, clicker)
 		local item = clicker:get_wielded_item()
 		local name = clicker:get_player_name()
-
+		if not name then return end
 		-- heal npc
 		if item:get_name() == "mobs:meat"
 		or item:get_name() == "farming:bread" then