diff --git a/app/lib/atom_serializer.rb b/app/lib/atom_serializer.rb
index 4e01c3d4302624f291360cb8b23d7e7ee6d9ad83..4ce0f45135082351fcf3dd0530ae1331ca1e684e 100644
--- a/app/lib/atom_serializer.rb
+++ b/app/lib/atom_serializer.rb
@@ -68,6 +68,9 @@ class AtomSerializer
     append_element(entry, 'published', stream_entry.created_at.iso8601)
     append_element(entry, 'updated', stream_entry.updated_at.iso8601)
     append_element(entry, 'title', stream_entry&.status&.title)
+
+    entry << author(stream_entry.account) if root
+
     append_element(entry, 'activity:object-type', TagManager::TYPES[stream_entry.object_type])
     append_element(entry, 'activity:verb', TagManager::VERBS[stream_entry.verb])