diff --git a/src/Bundle/ChillActivityBundle/Export/Export/LinkedToPerson/ListActivity.php b/src/Bundle/ChillActivityBundle/Export/Export/LinkedToPerson/ListActivity.php
index dee5dce8d..f052c5885 100644
--- a/src/Bundle/ChillActivityBundle/Export/Export/LinkedToPerson/ListActivity.php
+++ b/src/Bundle/ChillActivityBundle/Export/Export/LinkedToPerson/ListActivity.php
@@ -210,10 +210,20 @@ class ListActivity implements ListInterface, GroupedExportInterface
 
         $qb
             ->from('ChillActivityBundle:Activity', 'activity')
-            ->join('activity.person', 'person')
-            ->join('actperson.center', 'actcenter')
-            ->andWhere('actcenter IN (:authorized_centers)')
-            ->setParameter('authorized_centers', $centers);
+            ->join('activity.person', 'actperson')
+            ->join('actperson.centerHistory', 'centerHistory');
+
+        $qb->where(
+            $qb->expr()->andX(
+                $qb->expr()->lte('centerHistory.startDate', 'activity.date'),
+                $qb->expr()->orX(
+                    $qb->expr()->isNull('centerHistory.endDate'),
+                    $qb->expr()->gt('centerHistory.endDate', 'activity.date')
+                )
+            )
+        )
+            ->andWhere($qb->expr()->in('centerHistory.center', ':centers'))
+            ->setParameter('centers', $centers);
 
         foreach ($this->fields as $f) {
             if (in_array($f, $data['fields'], true)) {
@@ -224,17 +234,17 @@ class ListActivity implements ListInterface, GroupedExportInterface
                         break;
 
                     case 'person_firstname':
-                        $qb->addSelect('person.firstName AS person_firstname');
+                        $qb->addSelect('actperson.firstName AS person_firstname');
 
                         break;
 
                     case 'person_lastname':
-                        $qb->addSelect('person.lastName AS person_lastname');
+                        $qb->addSelect('actperson.lastName AS person_lastname');
 
                         break;
 
                     case 'person_id':
-                        $qb->addSelect('person.id AS person_id');
+                        $qb->addSelect('actperson.id AS person_id');
 
                         break;
 
@@ -251,7 +261,7 @@ class ListActivity implements ListInterface, GroupedExportInterface
                         break;
 
                     case 'type_name':
-                        $qb->join('activity.type', 'type');
+                        $qb->join('activity.activityType', 'type');
                         $qb->addSelect('type.name AS type_name');
 
                         break;
@@ -263,6 +273,11 @@ class ListActivity implements ListInterface, GroupedExportInterface
 
                         break;
 
+                    case 'attendee':
+                        $qb->addSelect('IDENTITY(activity.attendee) AS attendee');
+
+                        break;
+
                     default:
                         $qb->addSelect(sprintf('activity.%s as %s', $f, $f));
 
diff --git a/src/Bundle/ChillMainBundle/Export/Formatter/SpreadSheetFormatter.php b/src/Bundle/ChillMainBundle/Export/Formatter/SpreadSheetFormatter.php
index 4084bfb4f..6b77e5b2b 100644
--- a/src/Bundle/ChillMainBundle/Export/Formatter/SpreadSheetFormatter.php
+++ b/src/Bundle/ChillMainBundle/Export/Formatter/SpreadSheetFormatter.php
@@ -445,6 +445,8 @@ class SpreadSheetFormatter implements FormatterInterface
             $this->initializeCache($key);
         }
 
+        $value = null === $value ? '' : $value;
+
         return call_user_func($this->cacheDisplayableResult[$key], $value);
     }