diff --git a/lib/deprecatedlib.php b/lib/deprecatedlib.php
index 1327d93cfa3..1b3511f70aa 100644
--- a/lib/deprecatedlib.php
+++ b/lib/deprecatedlib.php
@@ -33,28 +33,10 @@ defined('MOODLE_INTERNAL') || die();
 /* === Functions that needs to be kept longer in deprecated lib than normal time period === */
 
 /**
- * Add an entry to the legacy log table.
- *
  * @deprecated since 2.7 use new events instead
- *
- * @param    int     $courseid  The course id
- * @param    string  $module  The module name  e.g. forum, journal, resource, course, user etc
- * @param    string  $action  'view', 'update', 'add' or 'delete', possibly followed by another word to clarify.
- * @param    string  $url     The file and parameters used to see the results of the action
- * @param    string  $info    Additional description information
- * @param    int     $cm      The course_module->id if there is one
- * @param    int|stdClass $user If log regards $user other than $USER
- * @return void
  */
-function add_to_log($courseid, $module, $action, $url='', $info='', $cm=0, $user=0) {
-    debugging('add_to_log() has been deprecated, please rewrite your code to the new events API', DEBUG_DEVELOPER);
-
-    // This is a nasty hack that allows us to put all the legacy stuff into legacy storage,
-    // this way we may move all the legacy settings there too.
-    $manager = get_log_manager();
-    if (method_exists($manager, 'legacy_add_to_log')) {
-        $manager->legacy_add_to_log($courseid, $module, $action, $url, $info, $cm, $user);
-    }
+function add_to_log() {
+    throw new coding_exception('add_to_log() has been removed, please rewrite your code to the new events API');
 }
 
 /**
diff --git a/lib/upgrade.txt b/lib/upgrade.txt
index fd1f97d3f43..d1e8450ca79 100644
--- a/lib/upgrade.txt
+++ b/lib/upgrade.txt
@@ -8,6 +8,7 @@ information provided here is intended especially for developers.
   of 'scrollable' is true.
 * The `$CFG->behat_retart_browser_after` configuration setting has been removed.
   The browser session is now restarted between all tests.
+* add_to_log() has been through final deprecation, please rewrite your code to the new events API.
 
 === 3.9 ===
 * Following function has been deprecated, please use \core\task\manager::run_from_cli().