diff --git a/docker/conf/indexer_journal_client.yml b/docker/conf/indexer_journal_client.yml
index 23c3e3f..e5b1b2f 100644
--- a/docker/conf/indexer_journal_client.yml
+++ b/docker/conf/indexer_journal_client.yml
@@ -1,10 +1,11 @@
 journal:
   brokers:
     - kafka
   group_id: swh.indexer.journal_client
+  prefix: swh.journal.objects
 
 max_messages: 50
 
 scheduler:
   cls: remote
   url: http://swh-scheduler:5008/