diff --git a/modules/db_instance/main.tf b/modules/db_instance/main.tf
index 48d26755..4b908963 100644
--- a/modules/db_instance/main.tf
+++ b/modules/db_instance/main.tf
@@ -20,7 +20,8 @@ resource "random_id" "snapshot_identifier" {
   count = var.create && !var.skip_final_snapshot ? 1 : 0
 
   keepers = {
-    id = var.identifier
+    id                  = var.identifier
+    snapshot_identifier = var.snapshot_identifier
   }
 
   byte_length = 4