diff --git a/security/entity_provider.rst b/security/entity_provider.rst
index 10db4ffa59d..51e2593bbd3 100644
--- a/security/entity_provider.rst
+++ b/security/entity_provider.rst
@@ -83,7 +83,7 @@ For this entry, suppose that you already have a ``User`` entity inside an
         {
             $this->isActive = true;
             // may not be needed, see section on salt below
-            // $this->salt = md5(uniqid(null, true));
+            // $this->salt = md5(uniqid('', true));
         }
 
         public function getUsername()