diff --git a/.vim/vimrc b/.vim/vimrc
index 145c9d0..4c0e8ff 100644
--- a/.vim/vimrc
+++ b/.vim/vimrc
@@ -777,7 +777,10 @@ function! s:on_lsp_buffer_enabled() abort
 
     " let g:lsp_format_sync_timeout = 1000
     let g:lsp_format_sync_timeout = 700
-    autocmd! BufWritePre *.rs,*.go call execute('LspDocumentFormatSync')
+    augroup lsp_format_sync
+        autocmd!
+        autocmd! BufWritePre *.rs,*.go call execute('LspDocumentFormatSync')
+    augroup END
 
     " refer to doc to add more commands
 endfunction