diff --git a/GlobalSettings.php b/GlobalSettings.php
index bc63538a59..0c8dc43cc9 100644
--- a/GlobalSettings.php
+++ b/GlobalSettings.php
@@ -273,14 +273,12 @@
 	$wgDiscordExperimentalWebhook = $wmgDiscordExperimentalWebhook;
 }
 
-// Dynamic cookie settings dependant on $wgServer
+// Dynamic cookie settings dependent on $wgServer
 foreach ( $wi->getAllowedDomains() as $domain ) {
 	if ( preg_match( '/' . preg_quote( $domain ) . '$/', $wi->server ) ) {
-		$wgCentralAuthCookieDomain = '.' . $domain;
 		$wgMFStopRedirectCookieHost = '.' . $domain;
 		break;
 	} else {
-		$wgCentralAuthCookieDomain = '';
 		if ( $wi->isExtensionActive( 'MobileFrontend' ) ) {
 			$host = parse_url( $wi->server, PHP_URL_HOST );
 			$wgMFStopRedirectCookieHost = $host !== false ? $host : null;