diff --git a/contrib/et/main.php b/contrib/et/main.php
index 46065d95..0c4563ab 100644
--- a/contrib/et/main.php
+++ b/contrib/et/main.php
@@ -56,8 +56,14 @@ class ET extends SimpleExtension {
 		$info['stat_image_tags'] = $database->get_one("SELECT COUNT(*) FROM image_tags");
 
 		$els = array();
-		foreach($_event_listeners as $el) {
-			$els[] = get_class($el);
+		foreach(get_declared_classes() as $class) {
+			$rclass = new ReflectionClass($class);
+			if($rclass->isAbstract()) {
+				// don't do anything
+			}
+			elseif(is_subclass_of($class, "Extension")) {
+				$els[] = $class;
+			}
 		}
 		$info['sys_extensions'] = join(', ', $els);