diff --git a/libraries/src/Mail/MailTemplate.php b/libraries/src/Mail/MailTemplate.php
index 59d314d0c8b5a..932cb6e2dfbea 100644
--- a/libraries/src/Mail/MailTemplate.php
+++ b/libraries/src/Mail/MailTemplate.php
@@ -294,7 +294,7 @@ public function send()
 			$this->mailer->addReplyTo($this->replyto->mail, $this->replyto->name);
 		}
 
-		if (trim($config->get('attachment_folder')))
+		if (trim($config->get('attachment_folder', '')))
 		{
 			$folderPath = rtrim(Path::check(JPATH_ROOT . '/' . $config->get('attachment_folder')), \DIRECTORY_SEPARATOR);