diff --git a/Library/Homebrew/manpages/brew.1.md.erb b/Library/Homebrew/manpages/brew.1.md.erb
index 7d45775eef..a2d916ee74 100644
--- a/Library/Homebrew/manpages/brew.1.md.erb
+++ b/Library/Homebrew/manpages/brew.1.md.erb
@@ -115,6 +115,9 @@ Note that environment variables must have a value set to be detected. For exampl
 `export HOMEBREW_NO_INSECURE_REDIRECT=1` rather than just
 `export HOMEBREW_NO_INSECURE_REDIRECT`.
 
+  * `HOMEBREW_ARCH`:
+    Linux only: If set, Homebrew will pass the set value to type name to the compiler's `-march` option instead of using the default (`-march=native`).
+
   * `HOMEBREW_ARTIFACT_DOMAIN`:
     If set, instructs Homebrew to prefix all download URLs, including those for bottles,
     with this variable. For example, `HOMEBREW_ARTIFACT_DOMAIN=http://localhost:8080`
diff --git a/docs/Manpage.md b/docs/Manpage.md
index e12e790cb2..612ad67f8e 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -992,6 +992,9 @@ Note that environment variables must have a value set to be detected. For exampl
 `export HOMEBREW_NO_INSECURE_REDIRECT=1` rather than just
 `export HOMEBREW_NO_INSECURE_REDIRECT`.
 
+  * `HOMEBREW_ARCH`:
+    Linux only: If set, Homebrew will pass the set value to type name to the compiler's `-march` option instead of using the default (`-march=native`).
+
   * `HOMEBREW_ARTIFACT_DOMAIN`:
     If set, instructs Homebrew to prefix all download URLs, including those for bottles,
     with this variable. For example, `HOMEBREW_ARTIFACT_DOMAIN=http://localhost:8080`
diff --git a/manpages/brew-cask.1 b/manpages/brew-cask.1
index b3829c13cf..59916b7f77 100644
--- a/manpages/brew-cask.1
+++ b/manpages/brew-cask.1
@@ -1,7 +1,7 @@
 .\" generated with Ronn/v0.7.3
 .\" http://github.com/rtomayko/ronn/tree/0.7.3
 .
-.TH "BREW\-CASK" "1" "April 2019" "Homebrew" "brew-cask"
+.TH "BREW\-CASK" "1" "May 2019" "Homebrew" "brew-cask"
 .
 .SH "NAME"
 \fBbrew\-cask\fR \- a friendly binary installer for macOS
diff --git a/manpages/brew.1 b/manpages/brew.1
index cb33b9da8c..58581f56f5 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -1,7 +1,7 @@
 .\" generated with Ronn/v0.7.3
 .\" http://github.com/rtomayko/ronn/tree/0.7.3
 .
-.TH "BREW" "1" "April 2019" "Homebrew" "brew"
+.TH "BREW" "1" "May 2019" "Homebrew" "brew"
 .
 .SH "NAME"
 \fBbrew\fR \- The missing package manager for macOS
@@ -1225,6 +1225,10 @@ Homebrew can install formulae via URL, e\.g\. \fBhttps://raw\.githubusercontent\
 Note that environment variables must have a value set to be detected\. For example, \fBexport HOMEBREW_NO_INSECURE_REDIRECT=1\fR rather than just \fBexport HOMEBREW_NO_INSECURE_REDIRECT\fR\.
 .
 .TP
+\fBHOMEBREW_ARCH\fR
+Linux only: If set, Homebrew will pass the set value to type name to the compiler\'s \fB\-march\fR option instead of using the default (\fB\-march=native\fR)\.
+.
+.TP
 \fBHOMEBREW_ARTIFACT_DOMAIN\fR
 If set, instructs Homebrew to prefix all download URLs, including those for bottles, with this variable\. For example, \fBHOMEBREW_ARTIFACT_DOMAIN=http://localhost:8080\fR will cause a formula with the URL \fBhttps://example\.com/foo\.tar\.gz\fR to instead download from \fBhttp://localhost:8080/example\.com/foo\.tar\.gz\fR\.
 .