diff --git a/mail/inc/class.mail_acl.inc.php b/mail/inc/class.mail_acl.inc.php
index 9369fc2ede..25a235d728 100644
--- a/mail/inc/class.mail_acl.inc.php
+++ b/mail/inc/class.mail_acl.inc.php
@@ -314,7 +314,7 @@ class mail_acl
 		}
 		else
 		{
-			$folders = explode(' ',$mailbox);
+			$folders = (array)$mailbox;
 		}
 		foreach($folders as $sbFolders)
 		{
@@ -376,7 +376,7 @@ class mail_acl
 		}
 		else
 		{
-			$folders = explode(' ',$mailbox);
+			$folders = (array)$mailbox;
 		}
 		foreach($folders as $sbFolders)
 		{