diff --git a/docs/Manpage.md b/docs/Manpage.md
index 6469b68ac6..fdec00d5c3 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -1981,6 +1981,9 @@ example, run `export HOMEBREW_NO_INSECURE_REDIRECT=1` rather than just
 - `HOMEBREW_GITHUB_PACKAGES_TOKEN`
   <br>Use this GitHub personal access token when accessing the GitHub Packages Registry (where bottles may be stored).
 
+- `HOMEBREW_DOCKER_REGISTRY_TOKEN`
+  <br>Use this bearer token for authenticating with a Docker registry proxying GitHub Packages.
+
 - `HOMEBREW_GITHUB_PACKAGES_USER`
   <br>Use this username when accessing the GitHub Packages Registry (where bottles may be stored).
 
diff --git a/manpages/brew.1 b/manpages/brew.1
index 555f9755b3..f53def03a8 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -2836,6 +2836,12 @@ Use this personal access token for the GitHub API, for features such as \fBbrew
 Use this GitHub personal access token when accessing the GitHub Packages Registry (where bottles may be stored)\.
 .
 .TP
+\fBHOMEBREW_DOCKER_REGISTRY_TOKEN\fR
+.
+.br
+Use this bearer token for authenticating with a Docker registry proxying GitHub Packages\.
+.
+.TP
 \fBHOMEBREW_GITHUB_PACKAGES_USER\fR
 .
 .br