diff --git a/includes/discovery/os/fortios.inc.php b/includes/discovery/os/fortios.inc.php
index bf432ddd7..62584f2cb 100644
--- a/includes/discovery/os/fortios.inc.php
+++ b/includes/discovery/os/fortios.inc.php
@@ -1,7 +1,7 @@
 <?php
 
 if (!$os) {
-    if (strstr($sysObjectId, '.1.3.6.1.4.1.12356.103.3.20')) {
+    if (strstr($sysObjectId, '.1.3.6.1.4.1.12356.103.3')) {
         $os = 'fortios';
     }
 }