diff --git a/README.md b/README.md
index fba7952..c755eeb 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ No modules.
 | <a name="input_data_reader_route53_zone_id"></a> [data\_reader\_route53\_zone\_id](#input\_data\_reader\_route53\_zone\_id) | If specified a data reader route53 record will be created | `string` | `""` | no |
 | <a name="input_data_reader_tags"></a> [data\_reader\_tags](#input\_data\_reader\_tags) | A map of tags to add to data reader resources. | `map(string)` | `{}` | no |
 | <a name="input_db_cluster_parameter_group_name"></a> [db\_cluster\_parameter\_group\_name](#input\_db\_cluster\_parameter\_group\_name) | The name of a DB Cluster parameter group to use | `string` | `"default.aurora5.6"` | no |
-| <a name="input_db_instance_parameter_group_name"></a> [db\_instance\_parameter\_group\_name](#input\_db\_instance\_parameter\_group\_name) | Instance parameter group to associate with all instances of the DB cluster. The db\_instance\_parameter\_group\_name parameter is only valid in combination with the allow\_major\_version\_upgrade parameter. | `any` | `null` | no |
+| <a name="input_db_cluster_db_instance_parameter_group_name"></a> [db\_cluster\_db\_instance\_parameter\_group\_name](#input\_db\_cluster\_db\_instance\_parameter\_group\_name) | Instance parameter group to associate with all instances of the DB cluster. The db\_instance\_parameter\_group\_name parameter is only valid in combination with the allow\_major\_version\_upgrade parameter. | `any` | `null` | no |
 | <a name="input_db_parameter_group_name"></a> [db\_parameter\_group\_name](#input\_db\_parameter\_group\_name) | The name of a DB parameter group to use | `string` | `"default.aurora5.6"` | no |
 | <a name="input_delete_timeout"></a> [delete\_timeout](#input\_delete\_timeout) | Timeout used for destroying cluster. This includes any cleanup task during the destroying process. | `string` | `"120m"` | no |
 | <a name="input_deletion_protection"></a> [deletion\_protection](#input\_deletion\_protection) | The database can't be deleted when this value is set to true. | `bool` | `true` | no |
diff --git a/variables.tf b/variables.tf
index 3fc1e37..de39af8 100644
--- a/variables.tf
+++ b/variables.tf
@@ -39,7 +39,7 @@ variable "allow_major_version_upgrade" {
   default     = false
 }
 
-variable "db_instance_parameter_group_name" {
+variable "db_cluster_db_instance_parameter_group_name" {
   description = "Instance parameter group to associate with all instances of the DB cluster. The db_instance_parameter_group_name parameter is only valid in combination with the allow_major_version_upgrade parameter."
   default     = null
 }