diff --git a/Library/Homebrew/dev-cmd/bump-cask-pr.rb b/Library/Homebrew/dev-cmd/bump-cask-pr.rb
index abdbf0e8a8..dee1732da4 100644
--- a/Library/Homebrew/dev-cmd/bump-cask-pr.rb
+++ b/Library/Homebrew/dev-cmd/bump-cask-pr.rb
@@ -45,6 +45,8 @@ module Homebrew
              description: "Specify the <URL> for the new download."
       flag   "--sha256=",
              description: "Specify the <SHA-256> checksum of the new download."
+      flag   "--fork-org=",
+             description: "Use the specified GitHub organization for forking."
       switch "-f", "--force",
              description: "Ignore duplicate open PRs."