diff --git a/plugins/PiwikAnalyticsPlugin.php b/plugins/PiwikAnalyticsPlugin.php
index e36bd1c5c3..8191f51811 100644
--- a/plugins/PiwikAnalyticsPlugin.php
+++ b/plugins/PiwikAnalyticsPlugin.php
@@ -73,7 +73,7 @@ class PiwikAnalyticsPlugin extends Plugin
     function __construct($root=null, $id=null)
     {
         $this->piwikroot = $root;
-        $this->piwikid   = $id;
+        $this->piwikId   = $id;
         parent::__construct();
     }