diff --git a/src/Content/Conversation.php b/src/Content/Conversation.php
index 6cad2b980..710422ee7 100644
--- a/src/Content/Conversation.php
+++ b/src/Content/Conversation.php
@@ -1381,8 +1381,6 @@ class Conversation
 				continue;
 			}
 
-			$threadsid++;
-
 			// prevent private email from leaking.
 			if ($item['network'] === Protocol::MAIL && $this->session->getLocalUserId() != $item['uid']) {
 				continue;