diff --git a/includes/discovery/ports.inc.php b/includes/discovery/ports.inc.php
index c682fa6e57..fd31fa9ce4 100644
--- a/includes/discovery/ports.inc.php
+++ b/includes/discovery/ports.inc.php
@@ -21,7 +21,7 @@ if ($device['port_association_mode'])
     $port_association_mode = get_port_assoc_mode_name ($device['port_association_mode']);
 
 // Build array of ports in the database and an ifIndex/ifName -> port_id map
-$ports_mapped = get_ports_mapped ($device['id']);
+$ports_mapped = get_ports_mapped ($device['device_id']);
 $ports_db = $ports_mapped['ports'];
 
 //