diff --git a/api/src/Etemplate/Widget/Box.php b/api/src/Etemplate/Widget/Box.php
index ea5cc72fab..947c5e1580 100644
--- a/api/src/Etemplate/Widget/Box.php
+++ b/api/src/Etemplate/Widget/Box.php
@@ -101,6 +101,7 @@ class Box extends Etemplate\Widget
 	 *
 	 * We only check passed widget and direct children.
 	 *
+	 * @param Etemplate\Widget $widget
 	 * @param string $cname
 	 * @param array $expand
 	 */