diff --git a/Export/Aggregator/ActivityReasonAggregator.php b/Export/Aggregator/ActivityReasonAggregator.php
index 33eb0499e..4cf422eec 100644
--- a/Export/Aggregator/ActivityReasonAggregator.php
+++ b/Export/Aggregator/ActivityReasonAggregator.php
@@ -29,9 +29,10 @@ use Chill\MainBundle\Templating\TranslatableStringHelper;
 use Doctrine\ORM\Query\Expr\Join;
 use Chill\MainBundle\Export\ExportElementValidatedInterface;
 use Symfony\Component\Validator\Context\ExecutionContextInterface;
+use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
 
 /**
- * 
+ *
  *
  * @author Julien Fastré <julien.fastre@champs-libres.coop>
  */
@@ -43,19 +44,19 @@ class ActivityReasonAggregator implements AggregatorInterface,
      * @var EntityRepository
      */
     protected $categoryRepository;
-    
+
     /**
      *
      * @var EntityRepository
      */
     protected $reasonRepository;
-    
+
     /**
      *
      * @var TranslatableStringHelper
      */
     protected $stringHelper;
-    
+
     public function __construct(
             EntityRepository $categoryRepository,
             EntityRepository $reasonRepository,
@@ -65,7 +66,7 @@ class ActivityReasonAggregator implements AggregatorInterface,
         $this->reasonRepository   = $reasonRepository;
         $this->stringHelper       = $stringHelper;
     }
-    
+
     public function alterQuery(QueryBuilder $qb, $data)
     {
         // add select element
@@ -78,9 +79,9 @@ class ActivityReasonAggregator implements AggregatorInterface,
         } else {
             throw new \RuntimeException('the data provided are not recognized');
         }
-        
+
         $qb->addSelect($elem.' as '.$alias);
-        
+
         // make a jointure only if needed
         $join = $qb->getDQLPart('join');
         if (
@@ -92,13 +93,13 @@ class ActivityReasonAggregator implements AggregatorInterface,
             (! array_key_exists('activity', $join))
         ) {
             $qb->add(
-                    'join', 
-                    array('activity' => 
+                    'join',
+                    array('activity' =>
                         new Join(Join::INNER_JOIN, 'activity.reasons', 'reasons')
-                        ), 
+                        ),
                     true);
         }
-        
+
         // join category if necessary
         if ($alias === 'activity_categories_id') {
             // add join only if needed
@@ -106,20 +107,20 @@ class ActivityReasonAggregator implements AggregatorInterface,
                 $qb->join('reasons.category', 'category');
             }
         }
-        
+
         // add the "group by" part
         $groupBy = $qb->getDQLPart('groupBy');
-        
+
         if (count($groupBy) > 0) {
             $qb->addGroupBy($alias);
         } else {
             $qb->groupBy($alias);
         }
     }
-    
+
     /**
      * Check if a join between Activity and another alias
-     * 
+     *
      * @param Join[] $joins
      * @param string $alias the alias to search for
      * @return boolean
@@ -131,7 +132,7 @@ class ActivityReasonAggregator implements AggregatorInterface,
                 return true;
             }
         }
-        
+
         return false;
     }
 
@@ -142,7 +143,7 @@ class ActivityReasonAggregator implements AggregatorInterface,
 
     public function buildForm(FormBuilderInterface $builder)
     {
-        $builder->add('level', 'choice', array(
+        $builder->add('level', ChoiceType::class, array(
             'choices' => array(
                 'By reason'             => 'reasons',
                 'By category of reason' => 'categories'
@@ -153,7 +154,7 @@ class ActivityReasonAggregator implements AggregatorInterface,
             'label' => 'Reason\'s level'
         ));
     }
-    
+
     public function validateForm($data, ExecutionContextInterface $context)
     {
         if ($data['level'] === null) {
@@ -166,7 +167,7 @@ class ActivityReasonAggregator implements AggregatorInterface,
     {
         return "Aggregate by activity reason";
     }
-    
+
     public function addRole()
     {
         return new Role(ActivityStatsVoter::STATS);
@@ -186,7 +187,7 @@ class ActivityReasonAggregator implements AggregatorInterface,
                 throw new \RuntimeException(sprintf("the level data '%s' is invalid",
                             $data['level']));
         }
-        
+
         return function($value) use ($data) {
             if ($value === '_header') {
                 return $data['level'] === 'reasons' ?
@@ -195,12 +196,12 @@ class ActivityReasonAggregator implements AggregatorInterface,
                         'Group by categories of reason'
                         ;
             }
-            
+
             switch ($data['level']) {
                 case 'reasons':
                     /* @var $r \Chill\ActivityBundle\Entity\ActivityReason */
                     $r = $this->reasonRepository->find($value);
-                    
+
                     return $this->stringHelper->localize($r->getCategory()->getName())
                             ." > "
                             . $this->stringHelper->localize($r->getName());
@@ -208,13 +209,13 @@ class ActivityReasonAggregator implements AggregatorInterface,
                     break;
                 case 'categories':
                     $c = $this->categoryRepository->find($value);
-                    
+
                     return $this->stringHelper->localize($c->getName());
                     break;
                 // no need for a default : the default was already set above
             }
         };
-        
+
     }
 
     public function getQueryKeys($data)
@@ -227,7 +228,7 @@ class ActivityReasonAggregator implements AggregatorInterface,
         } else {
             throw new \RuntimeException('the data provided are not recognised');
         }
-        
+
     }
 
 }