diff --git a/src/Worker/Delivery.php b/src/Worker/Delivery.php
index c98c60f426..d9a2109ba3 100644
--- a/src/Worker/Delivery.php
+++ b/src/Worker/Delivery.php
@@ -15,6 +15,7 @@ use Friendica\Model;
 use Friendica\Protocol\DFRN;
 use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\Email;
+use Friendica\Protocol\Activity;
 use Friendica\Util\Strings;
 use Friendica\Util\Network;
 use Friendica\Core\Worker;
@@ -500,6 +501,10 @@ class Delivery extends BaseObject
 			return;
 		}
 
+		if ($target_item['verb'] != Activity::POST) {
+			return;
+		}
+
 		if (!empty($thr_parent['object'])) {
 			$data = json_decode($thr_parent['object'], true);
 			if (!empty($data['reply_to'])) {