diff --git a/Library/Homebrew/compat/hbc/cli.rb b/Library/Homebrew/compat/hbc/cli.rb
index 9215256290..fb17a1d050 100644
--- a/Library/Homebrew/compat/hbc/cli.rb
+++ b/Library/Homebrew/compat/hbc/cli.rb
@@ -11,7 +11,7 @@ module Hbc
       EOS
     end)
 
-    option "--caskroom=PATH", (lambda do |value|
+    option "--caskroom=PATH", (lambda do |*|
       odisabled "`brew cask` with the `--caskroom` flag"
     end)
   end