diff --git a/Form/Type/CenterType.php b/Form/Type/CenterType.php
index e226c77ca..41db8dc98 100644
--- a/Form/Type/CenterType.php
+++ b/Form/Type/CenterType.php
@@ -25,6 +25,8 @@ use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
 use Chill\MainBundle\Entity\Center;
 use Chill\MainBundle\Form\Type\DataTransformer\CenterTransformer;
+use Symfony\Component\Form\Extension\Core\Type\HiddenType;
+use Symfony\Bridge\Doctrine\Form\Type\EntityType;
 
 /**
  *
@@ -78,9 +80,9 @@ class CenterType extends AbstractType
             throw new \RuntimeException("The user is not associated with "
                     . "any center. Associate user with a center");
         } elseif ($nbReachableCenters === 1) {
-            return 'hidden';
+            return HiddenType::class;
         } else {
-            return 'entity';
+            return EntityType::class;
         }
     }
 
@@ -93,7 +95,8 @@ class CenterType extends AbstractType
     public function configureOptions(OptionsResolver $resolver)
     {
         if (count($this->reachableCenters) > 1) {
-            $resolver->setDefault('class', 'Chill\MainBundle\Entity\Center');
+            $resolver->setDefault('class', Center::class);
+            $resolver->setDefault('choices', $this->reachableCenters);
         }
     }
 
@@ -105,7 +108,7 @@ class CenterType extends AbstractType
      */
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
-        if ($this->getParent() === 'hidden') {
+        if ($this->getParent() === HiddenType::class) {
             $builder->addModelTransformer($this->transformer);
         }
     }