diff --git a/src/applications/differential/storage/DifferentialRevision.php b/src/applications/differential/storage/DifferentialRevision.php
--- a/src/applications/differential/storage/DifferentialRevision.php
+++ b/src/applications/differential/storage/DifferentialRevision.php
@@ -65,6 +65,7 @@
       ->setViewPolicy($view_policy)
       ->setAuthorPHID($actor->getPHID())
       ->attachRelationships(array())
+      ->attachRepository(null)
       ->setStatus(ArcanistDifferentialRevisionStatus::NEEDS_REVIEW);
   }