diff --git a/src/Model/Item.php b/src/Model/Item.php
index 8425d5dc3..7439139e0 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -1474,7 +1474,7 @@ class Item
 		}
 
 		// When the post belongs to a a forum then all forum users are allowed to access it
-		foreach (Tag::getByURIId($uriid, [Tag::EXCLUSIVE_MENTION]) as $tag) {
+		foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
 			if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
 				$target_uid = User::getIdForURL($tag['url']);
 				if (!empty($target_uid)) {
diff --git a/src/Worker/Notifier.php b/src/Worker/Notifier.php
index abd5613dd..146bcce9f 100644
--- a/src/Worker/Notifier.php
+++ b/src/Worker/Notifier.php
@@ -730,7 +730,7 @@ class Notifier
 		$uid = $target_item['contact-uid'] ?: $target_item['uid'];
 
 		// Update the locally stored follower list when we deliver to a forum
-		foreach (Tag::getByURIId($target_item['uri-id'], [Tag::EXCLUSIVE_MENTION]) as $tag) {
+		foreach (Tag::getByURIId($target_item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
 			$target_contact = Contact::getByURL(Strings::normaliseLink($tag['url']), null, [], $uid);
 			if (($target_contact['contact-type'] == Contact::TYPE_COMMUNITY) && $target_contact['manually-approve']) {
 				Group::updateMembersForForum($target_contact['id']);