diff --git a/src/ninegate-1.0/src/Cadoles/CoreBundle/Entity/User.php b/src/ninegate-1.0/src/Cadoles/CoreBundle/Entity/User.php
index 1e6d13af..c41e0062 100644
--- a/src/ninegate-1.0/src/Cadoles/CoreBundle/Entity/User.php
+++ b/src/ninegate-1.0/src/Cadoles/CoreBundle/Entity/User.php
@@ -83,7 +83,7 @@ class User implements UserInterface, \Serializable
     private $authlevel;
 
     /**
-     * @ORM\Column(type="string", length=9)
+     * @ORM\Column(type="string", length=9, nullable=true)
      */
     private $siren;