diff --git a/lua/plugins/filetype.lua b/lua/plugins/filetype.lua
index f5c080088..dfbf2b0f0 100644
--- a/lua/plugins/filetype.lua
+++ b/lua/plugins/filetype.lua
@@ -459,6 +459,7 @@ vis.events.subscribe(vis.events.WIN_OPEN, function(win)
 		local file = io.popen(string.format("file -bL --mime-type -- '%s'", name:gsub("'", "'\\''")))
 		if file then
 			local mime = file:read('*all')
+			file:close()
 			if mime then
 				mime = mime:gsub('%s*$', '')
 			end