diff --git a/lib/upgradelib.php b/lib/upgradelib.php
index f83ad6cb89f..ffd7f86e386 100644
--- a/lib/upgradelib.php
+++ b/lib/upgradelib.php
@@ -431,6 +431,9 @@ function upgrade_stale_php_files_present() {
 
     $someexamplesofremovedfiles = array(
         // Removed in 3.6.
+        '/lib/classes/session/memcache.php',
+        '/lib/eventslib.php',
+        '/lib/form/submitlink.php',
         '/lib/medialib.php',
         '/lib/password_compat/lib/password.php',
         // Removed in 3.5.