diff --git a/includes/discovery/os/fortigate.inc.php b/includes/discovery/os/fortigate.inc.php
index d90e5cb63..eb15ac786 100755
--- a/includes/discovery/os/fortigate.inc.php
+++ b/includes/discovery/os/fortigate.inc.php
@@ -1,10 +1,9 @@
 <?php
 
 if(!$os) {
-  $fnSysVersion = shell_exec($config['snmpget'] . " -Ovq -".$device['snmpver']." -c ". $device['community'] ." ". $device['hostname'].":".$device['port'] ." 1.3.6.1.4.1.12356.1.3.0");
-  if(strstr($fnSysVersion, "Fortigate")) {
-    $os = "fortigate"; 
-  }
+
+ if (strstr($sysObjectId, "1.3.6.1.4.1.12356.15")) { $os = "fortigate";  }
+
 }
 
 ?>