diff --git a/LocalSettings.php b/LocalSettings.php
index a46399a6..f96a63e0 100644
--- a/LocalSettings.php
+++ b/LocalSettings.php
@@ -146,3 +146,6 @@
 # bootstrap theme settings
 $wgSiteCSS = 'custom.css';
 $wgTOCLocation = 'sidebar';
+
+# Advise wiki users that the site is deprecated.
+$wgSiteNotice = "THIS WIKI IS DEPRECATED. It is no longer being maintained. Please visit https://docs.voidlinux.org/ for the official documentation. If you can't find the information you're seeking, please raise an issue at https://github.com/void-linux/void-docs/issues";