diff --git a/Library/Homebrew/cmd/list.rb b/Library/Homebrew/cmd/list.rb
index cb1f27ed8b..4948c173c5 100644
--- a/Library/Homebrew/cmd/list.rb
+++ b/Library/Homebrew/cmd/list.rb
@@ -165,7 +165,7 @@ module Homebrew
 
   def list_casks(args:)
     cask_list = Cask::Cmd::List.new args.named
-    cask_list.one = ARGV.include? "-1"
+    cask_list.one = args.public_send(:'1?')
     cask_list.versions = args.versions?
     cask_list.full_name = args.full_name?
     cask_list.run