diff --git a/Library/Homebrew/cli/named_args.rb b/Library/Homebrew/cli/named_args.rb
index e5a2342b8b..ce9e8ea8f2 100644
--- a/Library/Homebrew/cli/named_args.rb
+++ b/Library/Homebrew/cli/named_args.rb
@@ -96,6 +96,7 @@ module Homebrew
           load_formula_or_cask(name, only: only, method: method)
         end.uniq.freeze
       end
+      private :to_objects
 
       def to_formulae_paths
         to_paths(only: :formulae)