diff --git a/emailadmin/inc/class.emailadmin_smtp_sql.inc.php b/emailadmin/inc/class.emailadmin_smtp_sql.inc.php
index af0035f9d2..9b02ede2dc 100644
--- a/emailadmin/inc/class.emailadmin_smtp_sql.inc.php
+++ b/emailadmin/inc/class.emailadmin_smtp_sql.inc.php
@@ -213,7 +213,7 @@ class emailadmin_smtp_sql extends emailadmin_smtp
 					{
 						foreach($members as $member)
 						{
-							if (($email = $this->accounts->id2name($member, 'account_email')) && !in_array($email, $userData['forward']))
+							if (($email = $this->accounts->id2name($member, 'account_email')) && !in_array($email, (array)$userData['forward']))
 							{
 								$userData['forward'][] = $email;
 							}