From e1f6b77204f5332ff5d1eb951382c6a449c3a040 Mon Sep 17 00:00:00 2001
From: Tony Murray <murraytony@gmail.com>
Date: Tue, 31 Oct 2023 08:25:35 -0500
Subject: [PATCH] Fix Ciscowlc error when bsnApIfNoOfUsers is not present
 (#15529)

fixes #15517
---
 LibreNMS/OS/Ciscowlc.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/LibreNMS/OS/Ciscowlc.php b/LibreNMS/OS/Ciscowlc.php
index bd46e7d70e..83291e18fd 100644
--- a/LibreNMS/OS/Ciscowlc.php
+++ b/LibreNMS/OS/Ciscowlc.php
@@ -52,7 +52,7 @@ class Ciscowlc extends Cisco implements
 
         foreach ($radios as $radio) {
             foreach ($radio as $slot) {
-                $numClients += $slot['AIRESPACE-WIRELESS-MIB::bsnApIfNoOfUsers'];
+                $numClients += $slot['AIRESPACE-WIRELESS-MIB::bsnApIfNoOfUsers'] ?? 0;
             }
         }