diff --git a/emhttp/plugins/dynamix.docker.manager/include/Helpers.php b/emhttp/plugins/dynamix.docker.manager/include/Helpers.php
index 82013ec44..1509705a0 100644
--- a/emhttp/plugins/dynamix.docker.manager/include/Helpers.php
+++ b/emhttp/plugins/dynamix.docker.manager/include/Helpers.php
@@ -109,7 +109,7 @@ function postToXML($post, $setOwnership=false) {
     $xml->TailscaleEnabled             = 'true';
     $xml->TailscaleIsExitNode          = xml_encode($post['TSisexitnode']);
     $xml->TailscaleHostname            = xml_encode($post['TShostname']);
-    $xml->TailscaleExitNodeIP          = xml_encode($post['TSexitnodeip']);
+    $xml->TailscaleExitNodeIP          = isset($post['TSexitnodeip']) ? xml_encode($post['TSexitnodeip']) : '';
     $xml->TailscaleSSH                 = xml_encode($post['TSssh']);
     $xml->TailscaleUserspaceNetworking = xml_encode($post['TSuserspacenetworking']);
     $xml->TailscaleLANAccess           = xml_encode($post['TSallowlanaccess']);