Character to designate default list item

If I want to designate an item in a text-only list as default, is there some standard character or symbol that I can use?

I considered using *, but it is commonly used to designate modified items, so I am reluctant to use it in my case.

Another option is to use the word “default” or “def”, but I prefer something shorter:

  • item 1
  • item 2 (default)
  • item 3