diff --git a/Library/Homebrew/cask/lib/hbc/dsl.rb b/Library/Homebrew/cask/lib/hbc/dsl.rb
index f8ed2bef55..db6739f4bb 100644
--- a/Library/Homebrew/cask/lib/hbc/dsl.rb
+++ b/Library/Homebrew/cask/lib/hbc/dsl.rb
@@ -204,7 +204,7 @@ module Hbc
       @sha256 ||= arg
     end
 
-    def license(arg = nil)
+    def license(*)
       odeprecated "Hbc::DSL#license"
     end