diff --git a/mod/assign/locallib.php b/mod/assign/locallib.php
index 1c4452958ee..646c6ce3464 100644
--- a/mod/assign/locallib.php
+++ b/mod/assign/locallib.php
@@ -5315,7 +5315,7 @@ class assign {
         }
 
         $flags = $this->get_user_flags($userid, true);
-        $flags->locked = 1;
+        $flags->locked = 0;
         $this->update_user_flags($flags);
 
         $user = $DB->get_record('user', array('id' => $userid), '*', MUST_EXIST);