diff --git a/src/wp-login.php b/src/wp-login.php
index 7e456dd899..504ec240f5 100644
--- a/src/wp-login.php
+++ b/src/wp-login.php
@@ -447,7 +447,7 @@ do_action( 'login_init' );
 /**
  * Fires before a specified login form action.
  *
- * The dynamic portion of the hook name, $action, refers to the action
+ * The dynamic portion of the hook name, `$action`, refers to the action
  * that brought the visitor to the login form. Actions include 'postpass',
  * 'logout', 'lostpassword', etc.
  *