diff --git a/src/applications/maniphest/storage/ManiphestTransaction.php b/src/applications/maniphest/storage/ManiphestTransaction.php
index f16e17a262..bbdd2c2756 100644
--- a/src/applications/maniphest/storage/ManiphestTransaction.php
+++ b/src/applications/maniphest/storage/ManiphestTransaction.php
@@ -59,7 +59,10 @@ final class ManiphestTransaction extends ManiphestDAO {
         $phids[] = $this->getNewValue();
         break;
       case ManiphestTransactionType::TYPE_EDGE:
-        return array_keys($this->getOldValue() + $this->getNewValue());
+        $phids = array_merge(
+          $phids,
+          array_keys($this->getOldValue() + $this->getNewValue()));
+        break;
       case ManiphestTransactionType::TYPE_ATTACH:
         $old = $this->getOldValue();
         $new = $this->getNewValue();