diff --git a/nvim/.config/nvim/lua/set.lua b/nvim/.config/nvim/lua/set.lua
index 5142081..9dd98fc 100644
--- a/nvim/.config/nvim/lua/set.lua
+++ b/nvim/.config/nvim/lua/set.lua
@@ -27,6 +27,11 @@ vim.opt.signcolumn = "yes"
 
 vim.opt.updatetime = 50
 
+vim.api.nvim_create_autocmd('FileType', {
+    pattern = 'cpp',
+    callback = function() vim.bo.commentstring = '// %s' end
+})
+
 vim.api.nvim_create_autocmd('FileType', {
     pattern = 'rust',
     callback = function()