diff --git a/main.tf b/main.tf
index 6df3bf7..c37605b 100644
--- a/main.tf
+++ b/main.tf
@@ -82,6 +82,8 @@ resource "aws_elasticsearch_domain_saml_options" "opensearch" {
     subject_key             = var.saml_subject_key
     roles_key               = var.saml_roles_key
     session_timeout_minutes = var.saml_session_timeout
+    master_user_name        = var.saml_master_user_name
+    master_backend_role     = var.saml_master_backend_role
 
     idp {
       entity_id        = var.saml_entity_id
diff --git a/variables.tf b/variables.tf
index 98ad870..4ef81d7 100644
--- a/variables.tf
+++ b/variables.tf
@@ -125,6 +125,18 @@ variable "saml_session_timeout" {
   default     = 60
 }
 
+variable "saml_master_backend_role" {
+  description = "This backend role receives full permissions to the cluster, equivalent to a new master role, but can only use those permissions within Dashboards."
+  type        = string
+  default     = null
+}
+
+variable "saml_master_user_name" {
+  description = "This username receives full permissions to the cluster, equivalent to a new master user, but can only use those permissions within Dashboards."
+  type        = string
+  default     = null
+}
+
 variable "index_templates" {
   description = "A map of all index templates to create."
   type        = map(any)