diff --git a/deployment/modules/gcs/main.tf b/deployment/modules/gcs/main.tf
index e53381b4..299850f3 100644
--- a/deployment/modules/gcs/main.tf
+++ b/deployment/modules/gcs/main.tf
@@ -68,8 +68,8 @@ resource "google_spanner_database" "log" {
 }
 
 resource "google_spanner_database_iam_binding" "database" {
-  instance = google_spanner_instance.log
-  database = google_spanner_database.log
+  instance = google_spanner_instance.log.name
+  database = google_spanner_database.log.name
   role     = "roles/compute.networkUser"
 
   members = [