diff --git a/includes/discovery/os/poweralert.inc.php b/includes/discovery/os/poweralert.inc.php
index fd4a4e1bcd..14c328ad69 100644
--- a/includes/discovery/os/poweralert.inc.php
+++ b/includes/discovery/os/poweralert.inc.php
@@ -1,7 +1,7 @@
 <?php
 
 if (!$os) {
-    if (preg_match('/^POWERALERT/', $sysDescr)) {
+    if (preg_match('/^POWERALERT/i', $sysDescr)) {
         $os = 'poweralert';
     }
 }