diff --git a/completions/bash/brew b/completions/bash/brew
index 6911d1f095..16f8d3dff4 100644
--- a/completions/bash/brew
+++ b/completions/bash/brew
@@ -436,6 +436,7 @@ _brew_bump_cask_pr() {
       --debug
       --dry-run
       --force
+      --fork-org
       --help
       --message
       --no-audit
diff --git a/completions/fish/brew.fish b/completions/fish/brew.fish
index 10a591260d..558a9775d9 100644
--- a/completions/fish/brew.fish
+++ b/completions/fish/brew.fish
@@ -394,6 +394,7 @@ __fish_brew_complete_arg 'bump-cask-pr' -l commit -d 'When passed with `--write`
 __fish_brew_complete_arg 'bump-cask-pr' -l debug -d 'Display any debugging information'
 __fish_brew_complete_arg 'bump-cask-pr' -l dry-run -d 'Print what would be done rather than doing it'
 __fish_brew_complete_arg 'bump-cask-pr' -l force -d 'Ignore duplicate open PRs'
+__fish_brew_complete_arg 'bump-cask-pr' -l fork-org -d 'Use the specified GitHub organization for forking'
 __fish_brew_complete_arg 'bump-cask-pr' -l help -d 'Show this message'
 __fish_brew_complete_arg 'bump-cask-pr' -l message -d 'Append message to the default pull request message'
 __fish_brew_complete_arg 'bump-cask-pr' -l no-audit -d 'Don\'t run `brew audit` before opening the PR'
diff --git a/completions/zsh/_brew b/completions/zsh/_brew
index 0ff9a1255c..d99036b790 100644
--- a/completions/zsh/_brew
+++ b/completions/zsh/_brew
@@ -491,6 +491,7 @@ _brew_bump_cask_pr() {
     '--debug[Display any debugging information]' \
     '(--write)--dry-run[Print what would be done rather than doing it]' \
     '--force[Ignore duplicate open PRs]' \
+    '--fork-org[Use the specified GitHub organization for forking]' \
     '--help[Show this message]' \
     '--message[Append message to the default pull request message]' \
     '(--online)--no-audit[Don'\''t run `brew audit` before opening the PR]' \
diff --git a/docs/Manpage.md b/docs/Manpage.md
index 3d7da48c6f..102fa073be 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -874,6 +874,8 @@ supplied by the user.
   Specify the *`URL`* for the new download.
 * `--sha256`:
   Specify the *`SHA-256`* checksum of the new download.
+* `--fork-org`:
+  Use the specified GitHub organization for forking.
 * `-f`, `--force`:
   Ignore duplicate open PRs.
 
diff --git a/manpages/brew.1 b/manpages/brew.1
index 0e66bf70e8..bbf95ae09f 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -1219,6 +1219,10 @@ Specify the \fIURL\fR for the new download\.
 Specify the \fISHA\-256\fR checksum of the new download\.
 .
 .TP
+\fB\-\-fork\-org\fR
+Use the specified GitHub organization for forking\.
+.
+.TP
 \fB\-f\fR, \fB\-\-force\fR
 Ignore duplicate open PRs\.
 .