diff --git a/src/topics/fork.js b/src/topics/fork.js
index d86322a9df..da0875cb9c 100644
--- a/src/topics/fork.js
+++ b/src/topics/fork.js
@@ -7,6 +7,7 @@ const categories = require('../categories');
 const privileges = require('../privileges');
 const plugins = require('../plugins');
 const meta = require('../meta');
+const activitypub = require('../activitypub');
 
 module.exports = function (Topics) {
 	Topics.createTopicFromPosts = async function (uid, title, pids, fromTid, cid) {
@@ -83,6 +84,7 @@ module.exports = function (Topics) {
 			}),
 			db.sortedSetsAdd(['topics:votes', `cid:${cid}:tids:votes`], postData.votes, tid),
 			Topics.events.log(fromTid, { type: 'fork', uid, href: `/topic/${tid}` }),
+			activitypub.feps.announceObject(pids[0]),
 		]);
 
 		plugins.hooks.fire('action:topic.fork', { tid: tid, fromTid: fromTid, uid: uid });
diff --git a/test/activitypub/feps.js b/test/activitypub/feps.js
index 02b484ad9e..1ec838b557 100644
--- a/test/activitypub/feps.js
+++ b/test/activitypub/feps.js
@@ -83,6 +83,12 @@ describe('FEPs', () => {
 				);
 
 				assert.strictEqual(activitypub._sent.size, 1);
+
+				const key = Array.from(activitypub._sent.keys())[0];
+				const activity = activitypub._sent.get(key);
+
+				assert(activity);
+				assert.strictEqual(activity.object, `${nconf.get('url')}/post/${reply1Pid}`);
 			});
 		});
 	});