diff --git a/src/controllers/activitypub/actors.js b/src/controllers/activitypub/actors.js
index 342b59c367..fecb7941a4 100644
--- a/src/controllers/activitypub/actors.js
+++ b/src/controllers/activitypub/actors.js
@@ -24,6 +24,7 @@ Actors.application = async function (req, res) {
 
 		type: 'Application',
 		name,
+		preferredUsername: name,
 
 		publicKey: {
 			id: `${nconf.get('url')}#key`,