diff --git a/MatomoTracker.php b/MatomoTracker.php
index f0a9906..ad6b4c3 100644
--- a/MatomoTracker.php
+++ b/MatomoTracker.php
@@ -2050,3 +2050,12 @@ function Matomo_getUrlTrackGoal($idSite, $idGoal, $revenue = 0.0)
 
     return $tracker->getUrlTrackGoal($idGoal, $revenue);
 }
+
+/**
+ * Ensure PiwikTracker class is available as well
+ *
+ * @deprecated
+ */
+if (!class_exists('\PiwikTracker')) {
+    include_once('./PiwikTracker.php');
+}
\ No newline at end of file
diff --git a/PiwikTracker.php b/PiwikTracker.php
index 4f7b5c8..16b50d9 100644
--- a/PiwikTracker.php
+++ b/PiwikTracker.php
@@ -11,7 +11,9 @@
  * @package MatomoTracker
  */
 
-include_once('./MatomoTracker.php');
+if (!class_exists('\MatomoTracker')) {
+    include_once('./MatomoTracker.php');
+}
 
 /**
  * Helper function to quickly generate the URL to track a page view.