diff --git a/block_course_overview_campus.php b/block_course_overview_campus.php
index cec0ad9be3595128de5eddcaf071ef2f012f71d4..0ce49a1fd9e8b43b10ea56a85b26893b6b687c54 100644
--- a/block_course_overview_campus.php
+++ b/block_course_overview_campus.php
@@ -944,8 +944,6 @@ class block_course_overview_campus extends block_base {
                     $selectedtoplevelcategorydisplayed = false;
 
                     // Sort top level category filter by category sort order.
-                    // Create empty array for sorted categories.
-                    $filtertoplevelcategoriessortorder = array();
                     // Fetch full category information for each category.
                     foreach ($filtertoplevelcategories as $ftl_key => $ftl_value) {
                         $filtertoplevelcategoriesfullinfo[] = $coursecategories[$ftl_key];