diff --git a/docs/Manpage.md b/docs/Manpage.md
index b0a6168f88..a5e0bf9aac 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -1878,6 +1878,9 @@ Note that environment variables must have a value set to be detected. For
 example, run `export HOMEBREW_NO_INSECURE_REDIRECT=1` rather than just
 `export HOMEBREW_NO_INSECURE_REDIRECT`.
 
+- `HOMEBREW_ADDITIONAL_GOOGLE_ANALYTICS_ID`
+  <br>Additional Google Analytics tracking ID to emit user behaviour analytics to. For more information, see: <https://docs.brew.sh/Analytics>
+
 - `HOMEBREW_ARCH`
   <br>Linux only: Pass this value to a type name representing the compiler's `-march` option.
 
diff --git a/manpages/brew.1 b/manpages/brew.1
index fffb7e0a18..9a4c8e94eb 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -2644,6 +2644,12 @@ Many Homebrew Cask commands accept one or more \fIcask\fR arguments\. These can
 Note that environment variables must have a value set to be detected\. For example, run \fBexport HOMEBREW_NO_INSECURE_REDIRECT=1\fR rather than just \fBexport HOMEBREW_NO_INSECURE_REDIRECT\fR\.
 .
 .TP
+\fBHOMEBREW_ADDITIONAL_GOOGLE_ANALYTICS_ID\fR
+.
+.br
+Additional Google Analytics tracking ID to emit user behaviour analytics to\. For more information, see: \fIhttps://docs\.brew\.sh/Analytics\fR
+.
+.TP
 \fBHOMEBREW_ARCH\fR
 .
 .br