diff --git a/plugins/dynamix.docker.manager/include/DockerClient.php b/plugins/dynamix.docker.manager/include/DockerClient.php
index 4593e905f..e2ef4ff13 100644
--- a/plugins/dynamix.docker.manager/include/DockerClient.php
+++ b/plugins/dynamix.docker.manager/include/DockerClient.php
@@ -14,6 +14,7 @@
 <?
 libxml_use_internal_errors(true); # Suppress any warnings from xml errors.
 
+$docroot = $docroot ?? $_SERVER['DOCUMENT_ROOT'] ?: '/usr/local/emhttp';
 require_once "$docroot/plugins/dynamix.docker.manager/include/Helpers.php";
 
 $dockerManPaths = [