diff --git a/blocks/site_main_menu/block_site_main_menu.php b/blocks/site_main_menu/block_site_main_menu.php
index d0d938d0224..cd26cbc918b 100644
--- a/blocks/site_main_menu/block_site_main_menu.php
+++ b/blocks/site_main_menu/block_site_main_menu.php
@@ -73,8 +73,9 @@ class block_site_main_menu extends block_list {
                         $attrs['title'] = $cm->modfullname;
                         $attrs['class'] = $cm->extraclasses . ' activity-action';
                         if ($cm->onclick) {
-                            $attrs['id'] = html_writer::random_id('onclick');
-                            $OUTPUT->add_action_handler(new component_action('click', $cm->onclick), $attrs['id']);
+                            // Get on-click attribute value if specified and decode the onclick - it
+                            // has already been encoded for display.
+                            $attrs['onclick'] = htmlspecialchars_decode($cm->onclick);
                         }
                         if (!$cm->visible) {
                             $attrs['class'] .= ' dimmed';
@@ -161,8 +162,9 @@ class block_site_main_menu extends block_list {
                         $attrs['title'] = $mod->modfullname;
                         $attrs['class'] = $mod->extraclasses . ' activity-action';
                         if ($mod->onclick) {
-                            $attrs['id'] = html_writer::random_id('onclick');
-                            $OUTPUT->add_action_handler(new component_action('click', $mod->onclick), $attrs['id']);
+                            // Get on-click attribute value if specified and decode the onclick - it
+                            // has already been encoded for display.
+                            $attrs['onclick'] = htmlspecialchars_decode($mod->onclick);
                         }
                         if (!$mod->visible) {
                             $attrs['class'] .= ' dimmed';
diff --git a/blocks/site_main_menu/tests/behat/add_url.feature b/blocks/site_main_menu/tests/behat/add_url.feature
new file mode 100644
index 00000000000..f391d7bc6f1
--- /dev/null
+++ b/blocks/site_main_menu/tests/behat/add_url.feature
@@ -0,0 +1,18 @@
+@block @block_main_menu
+Feature: Add URL to main menu block
+  In order to add helpful resources for students
+  As a admin
+  I need to add URLs to the main menu block and check it works.
+
+  @javascript
+  Scenario: Add a URL in menu block and ensure it appears
+    Given I log in as "admin"
+    And I am on site homepage
+    And I navigate to "Turn editing on" node in "Front page settings"
+    When I add a "URL" to section "0" and I fill the form with:
+      | Name | google |
+      | Description | gooooooooogle |
+      | External URL | http://www.google.com |
+      | id_display | In pop-up |
+    Then "google" "link" should exist in the "Main menu" "block"
+    And "Add an activity or resource" "link" should exist in the "Main menu" "block"