diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php
index 65fef964a4..afe3e48f6e 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php
@@ -50,6 +50,8 @@ class Connection extends AbstractConnection
 
     /**
      * {@inheritdoc}
+     *
+     * @param string $password WARNING: When the LDAP server allows unauthenticated binds, a blank $password will always be valid.
      */
     public function bind($dn = null, $password = null)
     {