diff --git a/dotfiles/.config/nvim/lua/lsp.lua b/dotfiles/.config/nvim/lua/lsp.lua
index 85e4cd7..85f9e8f 100644
--- a/dotfiles/.config/nvim/lua/lsp.lua
+++ b/dotfiles/.config/nvim/lua/lsp.lua
@@ -12,7 +12,7 @@ local common_on_attach = function(client, bufnr)
     -- Autoformat on save.
     if client.supports_method("textDocument/formatting") then
         vim.api.nvim_create_autocmd("BufWritePre", {
-            buffer = bufnr,
+            pattern = '*.py,*.rs',
             callback = function()
                 vim.lsp.buf.format()
             end,