diff --git a/Library/Homebrew/cli/named_args.rb b/Library/Homebrew/cli/named_args.rb
index ce9e8ea8f2..ea98cf12a8 100644
--- a/Library/Homebrew/cli/named_args.rb
+++ b/Library/Homebrew/cli/named_args.rb
@@ -60,7 +60,7 @@ module Homebrew
         if only != :formula
           begin
             return Cask::CaskLoader.load(name, config: Cask::Config.from_args(@parent))
-          rescue Cask::CaskUnavailableError
+          rescue Cask::CaskUnavailableError => e
             raise e if only == :cask
           end
         end