diff --git a/src/Content/Conversation.php b/src/Content/Conversation.php
index a82cb35e00..952b80e768 100644
--- a/src/Content/Conversation.php
+++ b/src/Content/Conversation.php
@@ -154,7 +154,7 @@ class Conversation
 				}
 
 				// Skip when the causer of the parent is the same as the author of the announce
-				if (($verb == Activity::ANNOUNCE) && !empty($thread_parent['causer-id'] && ($thread_parent['causer-id'] == $activity['author-id']))) {
+				if (($verb == Activity::ANNOUNCE) && !empty($thread_parent['causer-id']) && ($thread_parent['causer-id'] == $activity['author-id'])) {
 					continue;
 				}