diff --git a/Library/Homebrew/rubocops/cask/mixin/cask_help.rb b/Library/Homebrew/rubocops/cask/mixin/cask_help.rb
index b964bbe763..661f218b7d 100644
--- a/Library/Homebrew/rubocops/cask/mixin/cask_help.rb
+++ b/Library/Homebrew/rubocops/cask/mixin/cask_help.rb
@@ -6,7 +6,7 @@ module RuboCop
     module Cask
       # Common functionality for cops checking casks.
       module CaskHelp
-        prepend CommentsHelp
+        prepend CommentsHelp # Update the rbi file if changing this: https://github.com/sorbet/sorbet/issues/259
 
         sig { overridable.params(cask_block: RuboCop::Cask::AST::CaskBlock).void }
         def on_cask(cask_block); end
diff --git a/Library/Homebrew/rubocops/cask/mixin/cask_help.rbi b/Library/Homebrew/rubocops/cask/mixin/cask_help.rbi
index 366d9ac46f..134eae355e 100644
--- a/Library/Homebrew/rubocops/cask/mixin/cask_help.rbi
+++ b/Library/Homebrew/rubocops/cask/mixin/cask_help.rbi
@@ -1,6 +1,7 @@
 # typed: strict
 
 module RuboCop::Cop::Cask::CaskHelp
+  # Sorbet doesn't understand `prepend`: https://github.com/sorbet/sorbet/issues/259
+  include RuboCop::Cop::CommentsHelp
   requires_ancestor { RuboCop::Cop::Base }
-  # requires_ancestor { RuboCop::Cop::CommentsHelp }
 end