diff --git a/discovery.php b/discovery.php
index 324d77a60f..8c9c29eafc 100755
--- a/discovery.php
+++ b/discovery.php
@@ -115,7 +115,7 @@ foreach ($devices as $device)
   ## ARP Table
   include("includes/discovery/arp-table.php");
 
-  if($device['os'] == "netscreen") { 
+  if($device['os'] == "screenos") { 
     if ($device['type'] == "unknown") { $device['type'] = 'firewall'; }
   }