diff --git a/CHANGES.md b/CHANGES.md
index 2982bffd3e6f6e520041e74a170ecf0ef13ee037..2d29e135a1fe8f81b59278e3484a4d9a6260f8f7 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -4,6 +4,10 @@ moodle-theme_boost_campus_child
 Changes
 -------
 
+### Unreleased
+
+* 2021-01-14 - Bugfix: Fixed a regression after fixing the missing favicon which resulted in missing notes and hints in the course header.
+
 ### v3.10-r1
 
 * 2021-01-09 - Prepare compatibility for Moodle 3.10.
diff --git a/classes/output/core_renderer.php b/classes/output/core_renderer.php
index 6437a15c75f42350c315c92c34249a0916dc57ba..7f92770acf8e1ca1fec33f2b5a49f11e8767edf9 100644
--- a/classes/output/core_renderer.php
+++ b/classes/output/core_renderer.php
@@ -39,7 +39,7 @@ defined('MOODLE_INTERNAL') || die;
  * @package theme_boost_campus_child
  * @category output
  */
-class core_renderer extends \core_renderer {
+class core_renderer extends \theme_boost_campus\output\core_renderer {
 
     /**
      * Override to be able to use uploaded images from admin_setting as well.