diff --git a/lib/deprecatedlib.php b/lib/deprecatedlib.php
index 91d58f61526..43dd6b7c9d5 100644
--- a/lib/deprecatedlib.php
+++ b/lib/deprecatedlib.php
@@ -4378,42 +4378,12 @@ function can_use_html_editor() {
 
 
 /**
- * Returns an object with counts of failed login attempts
+ * Returns an object with counts of failed login attempts.
  *
- * Returns information about failed login attempts.  If the current user is
- * an admin, then two numbers are returned:  the number of attempts and the
- * number of accounts.  For non-admins, only the attempts on the given user
- * are shown.
- *
- * @deprecate since Moodle 2.7, use {@link user_count_login_failures()} instead.
- * @global moodle_database $DB
- * @uses CONTEXT_SYSTEM
- * @param string $mode Either 'admin' or 'everybody'
- * @param string $username The username we are searching for
- * @param string $lastlogin The date from which we are searching
- * @return int
+ * @deprecated since Moodle 2.7, use {@link user_count_login_failures()} instead.
  */
 function count_login_failures($mode, $username, $lastlogin) {
-    global $DB;
-
-    debugging('This method has been deprecated. Please use user_count_login_failures() instead.', DEBUG_DEVELOPER);
-
-    $params = array('mode'=>$mode, 'username'=>$username, 'lastlogin'=>$lastlogin);
-    $select = "module='login' AND action='error' AND time > :lastlogin";
-
-    $count = new stdClass();
-
-    if (is_siteadmin()) {
-        if ($count->attempts = $DB->count_records_select('log', $select, $params)) {
-            $count->accounts = $DB->count_records_select('log', $select, $params, 'COUNT(DISTINCT info)');
-            return $count;
-        }
-    } else if ($mode == 'everybody') {
-        if ($count->attempts = $DB->count_records_select('log', "$select AND info = :username", $params)) {
-            return $count;
-        }
-    }
-    return NULL;
+    throw new coding_exception('count_login_failures() can not be used any more, please use user_count_login_failures().');
 }
 
 /**