diff --git a/quickstart/201-postgresql-fs-db/postgresql-fs-db.tf b/quickstart/201-postgresql-fs-db/postgresql-fs-db.tf
index 6041eb60..703a098b 100644
--- a/quickstart/201-postgresql-fs-db/postgresql-fs-db.tf
+++ b/quickstart/201-postgresql-fs-db/postgresql-fs-db.tf
@@ -1,6 +1,6 @@
 resource "azurerm_postgresql_flexible_server_database" "default" {
   name      = "${random_pet.name_prefix.id}-db"
   server_id = azurerm_postgresql_flexible_server.default.id
-  collation = "en_US.UTF8"
+  collation = "en_US.utf8"
   charset   = "UTF8"
 }