diff --git a/cookbook/security/voters.rst b/cookbook/security/voters.rst
index d94177f3365..0eb37617514 100644
--- a/cookbook/security/voters.rst
+++ b/cookbook/security/voters.rst
@@ -67,6 +67,10 @@ and compare the IP address against a set of blacklisted IP addresses:
 
     class ClientIpVoter implements VoterInterface
     {
+        private $container;
+
+        private $blacklistedIp;
+            
         public function __construct(ContainerInterface $container, array $blacklistedIp = array())
         {
             $this->container     = $container;