diff --git a/classes/exporters/CourseParticipantsExporter.php b/classes/exporters/CourseParticipantsExporter.php
index 1971799bac2f599b7a60eb4557c4748f2e7bbabb..b3f5257024dbdc700b49673ef23a90c717af050f 100644
--- a/classes/exporters/CourseParticipantsExporter.php
+++ b/classes/exporters/CourseParticipantsExporter.php
@@ -302,7 +302,10 @@ class CourseParticipantsExporter extends Exporter
             $sql_data['semester_end'] = $semester->ende;
         }
         if ($institute_id) {
-            $where_sql[] = '`seminar_inst`.`institut_id` = :institute_id';
+            $where_sql[] = '`seminar_inst`.`institut_id` IN (
+                SELECT `Institut_id` FROM `Institute`
+                WHERE (`Institut_id` = :institute_id) OR (`fakultaets_id` = :institute_id)
+            )';
             $sql_data['institute_id'] = $institute_id;
         }
         if ($status_levels) {