diff --git a/indexes.yaml b/indexes.yaml
index afac1363..96c13fa2 100644
--- a/indexes.yaml
+++ b/indexes.yaml
@@ -38,6 +38,7 @@ indexes:
     unique: true
     key:
       addrview: 1
+      _id: 1
 - collection: addresses
   type: users # index applies to users database
   index: