diff --git a/.changes/unreleased/Fixed-20241211-151057.yaml b/.changes/unreleased/Fixed-20241211-151057.yaml
new file mode 100644
index 000000000..8b341137c
--- /dev/null
+++ b/.changes/unreleased/Fixed-20241211-151057.yaml
@@ -0,0 +1,5 @@
+kind: Fixed
+body: 'Export: activity filtering of users that were associated to an activity between certain dates. Results contained activities that were not within the specified date range"'
+time: 2024-12-11T15:10:57.973144789+01:00
+custom:
+    Issue: "345"
diff --git a/src/Bundle/ChillActivityBundle/Export/Filter/PersonFilters/PersonHavingActivityBetweenDateFilter.php b/src/Bundle/ChillActivityBundle/Export/Filter/PersonFilters/PersonHavingActivityBetweenDateFilter.php
index 2f734d237..6362b8295 100644
--- a/src/Bundle/ChillActivityBundle/Export/Filter/PersonFilters/PersonHavingActivityBetweenDateFilter.php
+++ b/src/Bundle/ChillActivityBundle/Export/Filter/PersonFilters/PersonHavingActivityBetweenDateFilter.php
@@ -55,6 +55,8 @@ final readonly class PersonHavingActivityBetweenDateFilter implements ExportElem
             .' AND '
             .'(person_person_having_activity.id = person.id OR person MEMBER OF activity_person_having_activity.persons)');
 
+        $sqb->andWhere('activity_person_having_activity.id = activity.id');
+
         if (isset($data['reasons']) && [] !== $data['reasons']) {
             // add clause activity reason
             $sqb->join('activity_person_having_activity.reasons', 'reasons_person_having_activity');