diff --git a/src/Bundle/ChillActivityBundle/Export/Export/LinkedToACP/AvgActivityVisitDuration.php b/src/Bundle/ChillActivityBundle/Export/Export/LinkedToACP/AvgActivityVisitDuration.php
index 560ae8754..69533a09d 100644
--- a/src/Bundle/ChillActivityBundle/Export/Export/LinkedToACP/AvgActivityVisitDuration.php
+++ b/src/Bundle/ChillActivityBundle/Export/Export/LinkedToACP/AvgActivityVisitDuration.php
@@ -17,6 +17,7 @@ use Chill\ActivityBundle\Security\Authorization\ActivityStatsVoter;
 use Chill\MainBundle\Export\ExportInterface;
 use Chill\MainBundle\Export\FormatterInterface;
 use Chill\MainBundle\Export\GroupedExportInterface;
+use Chill\PersonBundle\Export\Declarations as PersonDeclarations;
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\EntityRepository;
 use Doctrine\ORM\Query;
@@ -55,7 +56,7 @@ class AvgActivityVisitDuration implements ExportInterface, GroupedExportInterfac
     public function getLabels($key, array $values, $data)
     {
         if ('export_avg_activity_visit_duration' !== $key) {
-            throw new LogicException("the key {$key} is not used by this export");
+            throw new \LogicException("the key {$key} is not used by this export");
         }
 
         return static fn ($value) => '_header' === $value ? 'Average activities linked to an accompanying period visit duration' : $value;
@@ -83,10 +84,13 @@ class AvgActivityVisitDuration implements ExportInterface, GroupedExportInterfac
 
     public function initiateQuery(array $requiredModifiers, array $acl, array $data = [])
     {
-        $qb = $this->repository->createQueryBuilder('activity')
-            ->join('activity.accompanyingPeriod', 'acp');
+        $qb = $this->repository->createQueryBuilder('activity');
 
-        $qb->select('AVG(activity.travelTime) as export_avg_activity_visit_duration');
+        $qb
+            ->join('activity.accompanyingPeriod', 'acp')
+            ->select('AVG(activity.travelTime) as export_avg_activity_visit_duration')
+            ->andWhere($qb->expr()->isNotNull('activity.travelTime'))
+            ;
 
         return $qb;
     }