diff --git a/lua/genghis/config.lua b/lua/genghis/config.lua
index e25b325..e452cc1 100644
--- a/lua/genghis/config.lua
+++ b/lua/genghis/config.lua
@@ -1,16 +1,17 @@
 local M = {}
 --------------------------------------------------------------------------------
 
----@return string|string[]
+---@return string|string[]|false
 local function setDefaultTrashCmd()
 	local osTrashCmd
-	local system = jit.os:lower()
-	if system == "mac" or system == "osx" then
+	if jit.os == "osx" then
 		osTrashCmd = "trash"
-	elseif system == "windows" then
+	elseif jit.os == "Windows" then
 		osTrashCmd = "trash"
-	else
+	elseif jit.os == "Linux" then
 		osTrashCmd = { "gio", "trash" }
+	else
+		return false
 	end
 	return osTrashCmd
 end
diff --git a/lua/genghis/operations/other.lua b/lua/genghis/operations/other.lua
index 3016379..b777356 100644
--- a/lua/genghis/operations/other.lua
+++ b/lua/genghis/operations/other.lua
@@ -13,19 +13,17 @@ function M.chmodx()
 	vim.cmd.edit() -- reload the file
 end
 
-function M.trashFile(opts)
-	---DEPRECATION
-	if opts then
-		u.notify("The `trashCmd` option has been moved to the setup call.", "warn")
-		return
-	end
-
+function M.trashFile()
 	vim.cmd("silent! update")
 	local oldFilePath = vim.api.nvim_buf_get_name(0)
 	local oldName = vim.fs.basename(oldFilePath)
 
 	-- execute the trash command
 	local trashCmd = require("genghis.config").config.trashCmd
+	if not trashCmd then
+		u.notify("Unknown operating system. Please provide a custom `trashCmd`.", "warn")
+		return
+	end
 	if type(trashCmd) == "string" then trashCmd = { trashCmd } end
 	table.insert(trashCmd, oldFilePath)
 	local result = vim.system(trashCmd):wait()