diff --git a/public/blocks/site_main_menu/block_site_main_menu.php b/public/blocks/site_main_menu/block_site_main_menu.php
index 91e3eee78d9..2d8b42d5d14 100644
--- a/public/blocks/site_main_menu/block_site_main_menu.php
+++ b/public/blocks/site_main_menu/block_site_main_menu.php
@@ -15,6 +15,7 @@
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 defined('MOODLE_INTERNAL') || die();
+require_once($CFG->dirroot . '/course/lib.php');
 require_once($CFG->dirroot. '/course/format/lib.php');
 
 /**