diff --git a/lua/codemp/buffers.lua b/lua/codemp/buffers.lua
index 4244e1e..9e56ffe 100644
--- a/lua/codemp/buffers.lua
+++ b/lua/codemp/buffers.lua
@@ -90,6 +90,7 @@ local function attach(name, buffer, content, nowait)
 	controller:callback(function (_controller) async:send() end)
 	vim.defer_fn(function() async:send() end, 500) -- force a try_recv after 500ms
 
+	vim.filetype.match({ buf = buffer })
 	print(" ++ attached to buffer " .. name)
 	return controller
 end