diff --git a/Library/Homebrew/cask/lib/hbc/container/rar.rb b/Library/Homebrew/cask/lib/hbc/container/rar.rb
index b060fc515c..0d614af8e9 100644
--- a/Library/Homebrew/cask/lib/hbc/container/rar.rb
+++ b/Library/Homebrew/cask/lib/hbc/container/rar.rb
@@ -1,8 +1,8 @@
-require "hbc/container/generic_unar"
+require "hbc/container/base"
 
 module Hbc
   class Container
-    class Rar
+    class Rar < Base
       def self.can_extract?(path:, magic_number:)
         magic_number.match?(/\ARar!/n)
       end