diff --git a/docs/Installation.md b/docs/Installation.md
index bb4d80a532..d4486ad734 100644
--- a/docs/Installation.md
+++ b/docs/Installation.md
@@ -63,6 +63,10 @@ chmod -R go-w "$(brew --prefix)/share/zsh"
 
 Create a Homebrew installation wherever you extract the tarball. Whichever `brew` command is called is where the packages will be installed. You can use this as you see fit, e.g. to have a system set of libs in the default prefix and tweaked formulae for development in `~/homebrew`.
 
+### Unattended installation
+
+If you want a non-interactive run of the Homebrew installer that doesn't prompt for passwords (e.g. in automation scripts), prepend [`NONINTERACTIVE=1`](https://github.com/Homebrew/install/#install-homebrew-on-macos-or-linux) to the installation command.
+
 ## Uninstallation
 
 Uninstallation is documented in the [FAQ](FAQ.md).