diff --git a/spec/System/TestItemListControl_spec.lua b/spec/System/TestItemListControl_spec.lua
index 2d690a6eb8..9edad94921 100644
--- a/spec/System/TestItemListControl_spec.lua
+++ b/spec/System/TestItemListControl_spec.lua
@@ -176,6 +176,33 @@ describe("ItemListControl", function()
 		assert.are.same({ }, itemsTab.items)
 	end)
 
+	it("requires confirmation before deleting unused items", function()
+		local control, itemsTab = newItemListControl()
+		local onConfirm
+		local deleted = false
+		itemsTab.GetEquippedSlotForItem = function()
+			return nil
+		end
+		itemsTab.DeleteItem = function()
+			deleted = true
+		end
+		itemsTab.build.treeTab.specList = { }
+		main.OpenConfirmPopup = function(_, title, message, confirmLabel, callback)
+			assert.are.equal("Delete Unused", title)
+			assert.are.equal("Are you sure you want to delete all unused items in this build?", message)
+			assert.are.equal("Delete", confirmLabel)
+			onConfirm = callback
+		end
+
+		control.controls.deleteUnused.onClick()
+
+		assert.is_false(deleted)
+
+		onConfirm()
+
+		assert.is_true(deleted)
+	end)
+
 	it("releases focus after opening an item with a double click", function()
 		local control, itemsTab = newItemListControl()
 		local item = new("Item"):Item([[
diff --git a/src/Classes/ItemListControl.lua b/src/Classes/ItemListControl.lua
index ee50d6371b..fe6b37c39e 100644
--- a/src/Classes/ItemListControl.lua
+++ b/src/Classes/ItemListControl.lua
@@ -23,7 +23,7 @@ function ItemListClass:ItemListControl(anchor, rect, itemsTab, forceTooltip)
 		itemsTab:SortItemList()
 		self:UpdateList()
 	end)
-	self.controls.deleteUnused = new("ButtonControl"):ButtonControl({"LEFT",self.controls.sort,"RIGHT"}, {4, 0, 84, 18}, "Del Unused", function()
+	local function deleteUnused()
 		local delList = {}
 		for _, itemId in pairs(itemsTab.itemOrderList) do
 			if not itemsTab:GetEquippedSlotForItem(itemsTab.items[itemId]) and not self:FindEquippedAbyssJewel(itemId, false) and not self:FindSocketedJewel(itemId, false) then
@@ -42,6 +42,9 @@ function ItemListClass:ItemListControl(anchor, rect, itemsTab, forceTooltip)
 		itemsTab:AddUndoState()
 		itemsTab.build.buildFlag = true
 		self:UpdateList()
+	end
+	self.controls.deleteUnused = new("ButtonControl"):ButtonControl({"LEFT",self.controls.sort,"RIGHT"}, {4, 0, 84, 18}, "Del Unused", function()
+		main:OpenConfirmPopup("Delete Unused", "Are you sure you want to delete all unused items in this build?", "Delete", deleteUnused)
 	end)
 	self.controls.deleteUnused.enabled = function()
 		return #self.list > 0