diff --git a/src/applications/maniphest/editor/ManiphestTransactionEditor.php b/src/applications/maniphest/editor/ManiphestTransactionEditor.php
index 0f9b6b4618..197c729d6c 100644
--- a/src/applications/maniphest/editor/ManiphestTransactionEditor.php
+++ b/src/applications/maniphest/editor/ManiphestTransactionEditor.php
@@ -369,6 +369,7 @@ final class ManiphestTransactionEditor
         $blocked_tasks = id(new ManiphestTaskQuery())
           ->setViewer($this->getActor())
           ->withPHIDs($blocked_phids)
+          ->needSubscriberPHIDs(true)
           ->execute();
 
         $old = $unblock_xaction->getOldValue();