diff --git a/lib/outputcomponents.php b/lib/outputcomponents.php
index 6c75bfee66d..97d61a3435a 100644
--- a/lib/outputcomponents.php
+++ b/lib/outputcomponents.php
@@ -568,6 +568,7 @@ class action_link implements renderable {
     public function __construct(moodle_url $url, $text, component_action $action=null, array $attributes=null) {
         $this->url       = clone($url);
         $this->text      = $text;
+        $this->attributes = (array)$attributes;
         if ($action) {
             $this->add_action($action);
         }