diff --git a/completions/fish/brew.fish b/completions/fish/brew.fish
index 5e30aa3426..c405fbbea4 100644
--- a/completions/fish/brew.fish
+++ b/completions/fish/brew.fish
@@ -93,6 +93,7 @@ function __fish_brew_suggest_formulae_all -d 'Lists all available formulae with
     set -q __brew_cache_path
     or set -gx __brew_cache_path (brew --cache)
 
+    # TODO: Probably drop this since I think that desc_cache.json is no longer generated. Is there a different available cache?
     if test -f "$__brew_cache_path/desc_cache.json"
         __fish_brew_ruby_parse_json "$__brew_cache_path/desc_cache.json" \
             '.each{ |k, v| puts([k, v].reject(&:nil?).join("\t")) }'