diff --git a/.changes/unreleased/Fixed-20231107-144039.yaml b/.changes/unreleased/Fixed-20231107-144039.yaml
new file mode 100644
index 000000000..2292b8adb
--- /dev/null
+++ b/.changes/unreleased/Fixed-20231107-144039.yaml
@@ -0,0 +1,6 @@
+kind: Fixed
+body: 'Export: fix "group accompanying period by geographical unit": take into account
+  the accompanying periods when the period is not located within an unit'
+time: 2023-11-07T14:40:39.46483404+01:00
+custom:
+  Issue: "185"
diff --git a/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/GeographicalUnitStatAggregator.php b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/GeographicalUnitStatAggregator.php
index f1c0d60ad..3fa612988 100644
--- a/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/GeographicalUnitStatAggregator.php
+++ b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/GeographicalUnitStatAggregator.php
@@ -83,7 +83,12 @@ final readonly class GeographicalUnitStatAggregator implements AggregatorInterfa
             'acp_geog_units'
         );
 
-        $qb->andWhere($qb->expr()->in('acp_geog_units.layer', ':acp_geog_unit_layer'));
+        $qb->andWhere(
+            $qb->expr()->orX(
+                $qb->expr()->isNull('acp_geog_units'),
+                $qb->expr()->in('acp_geog_units.layer', ':acp_geog_unit_layer')
+            )
+        );
 
         $qb->setParameter('acp_geog_unit_layer', $data['level']);