diff --git a/builtin/game/item.lua b/builtin/game/item.lua
index 36c2c1a68..cedd3b712 100644
--- a/builtin/game/item.lua
+++ b/builtin/game/item.lua
@@ -389,7 +389,7 @@ function core.do_item_eat(hp_change, replace_with_item, itemstack, user, pointed
 			else
 				local inv = user:get_inventory()
 				if inv:room_for_item("main", {name=replace_with_item}) then
-					inv:add_item("main", replace_with_item)
+					user:add_item("main", replace_with_item)
 				else
 					local pos = user:getpos()
 					pos.y = math.floor(pos.y + 0.5)
@@ -423,7 +423,7 @@ function core.handle_node_drops(pos, drops, digger)
 	if digger:get_inventory() then
 		local _, dropped_item
 		for _, dropped_item in ipairs(drops) do
-			local left = digger:get_inventory():add_item("main", dropped_item)
+			local left = digger:add_item("main", dropped_item)
 			if not left:is_empty() then
 				local p = {
 					x = pos.x + math.random()/2-0.25,
diff --git a/builtin/game/item_entity.lua b/builtin/game/item_entity.lua
index a66bf33d0..939055cc4 100644
--- a/builtin/game/item_entity.lua
+++ b/builtin/game/item_entity.lua
@@ -208,7 +208,7 @@ core.register_entity(":__builtin:item", {
 	on_punch = function(self, hitter)
 		local inv = hitter:get_inventory()
 		if inv and self.itemstring ~= '' then
-			local left = inv:add_item("main", self.itemstring)
+			local left = hitter:add_item("main", self.itemstring)
 			if left and not left:is_empty() then
 				self.itemstring = left:to_string()
 				return
diff --git a/builtin/game/register.lua b/builtin/game/register.lua
index f330491a2..c6c20c8a6 100644
--- a/builtin/game/register.lua
+++ b/builtin/game/register.lua
@@ -507,6 +507,9 @@ core.registered_on_player_receive_fields, core.register_on_player_receive_fields
 core.registered_on_cheats, core.register_on_cheat = make_registration()
 core.registered_on_crafts, core.register_on_craft = make_registration()
 core.registered_craft_predicts, core.register_craft_predict = make_registration()
+core.registered_on_inventory_move_item, core.register_on_inventory_move_item = make_registration()
+core.registered_on_inventory_add_item, core.register_on_inventory_add_item = make_registration()
+core.registered_on_inventory_drop_item, core.register_on_inventory_drop_item = make_registration()
 core.registered_on_protection_violation, core.register_on_protection_violation = make_registration()
 core.registered_on_item_eats, core.register_on_item_eat = make_registration()
 core.registered_on_punchplayers, core.register_on_punchplayer = make_registration()