diff --git a/Sources/MailAgent/APIs/SMTP.php b/Sources/MailAgent/APIs/SMTP.php
index 0b8488918a..64077cd1a8 100644
--- a/Sources/MailAgent/APIs/SMTP.php
+++ b/Sources/MailAgent/APIs/SMTP.php
@@ -112,7 +112,7 @@ public function connect(): bool
 			return false;
 		}
 
-		$helo = getHostname();
+		$helo = $this->getHostname();
 
 		if (Config::$modSettings['smtp_username'] != '' && Config::$modSettings['smtp_password'] != '') {
 			// EHLO could be understood to mean encrypted hello...