diff --git a/README.md b/README.md
index a98eb30712..6ad9228198 100644
--- a/README.md
+++ b/README.md
@@ -284,7 +284,7 @@ We are grateful to the community for contributing bugfixes and improvements! Ple
 | <a name="input_iam_role_path"></a> [iam\_role\_path](#input\_iam\_role\_path) | Cluster IAM role path | `string` | `null` | no |
 | <a name="input_iam_role_permissions_boundary"></a> [iam\_role\_permissions\_boundary](#input\_iam\_role\_permissions\_boundary) | ARN of the policy that is used to set the permissions boundary for the IAM role | `string` | `null` | no |
 | <a name="input_iam_role_tags"></a> [iam\_role\_tags](#input\_iam\_role\_tags) | A map of additional tags to add to the IAM role created | `map(string)` | `{}` | no |
-| <a name="input_iam_role_use_name_prefix"></a> [iam\_role\_use\_name\_prefix](#input\_iam\_role\_use\_name\_prefix) | Determines whether the IAM role name (`iam_role_name`) is used as a prefix | `string` | `true` | no |
+| <a name="input_iam_role_use_name_prefix"></a> [iam\_role\_use\_name\_prefix](#input\_iam\_role\_use\_name\_prefix) | Determines whether the IAM role name (`iam_role_name`) is used as a prefix | `bool` | `true` | no |
 | <a name="input_manage_aws_auth_configmap"></a> [manage\_aws\_auth\_configmap](#input\_manage\_aws\_auth\_configmap) | Determines whether to manage the aws-auth configmap | `bool` | `false` | no |
 | <a name="input_node_security_group_additional_rules"></a> [node\_security\_group\_additional\_rules](#input\_node\_security\_group\_additional\_rules) | List of additional security group rules to add to the node security group created. Set `source_cluster_security_group = true` inside rules to set the `cluster_security_group` as source | `any` | `{}` | no |
 | <a name="input_node_security_group_description"></a> [node\_security\_group\_description](#input\_node\_security\_group\_description) | Description of the node security group created | `string` | `"EKS node shared security group"` | no |
diff --git a/modules/eks-managed-node-group/README.md b/modules/eks-managed-node-group/README.md
index 6c02fe5974..0733ae8642 100644
--- a/modules/eks-managed-node-group/README.md
+++ b/modules/eks-managed-node-group/README.md
@@ -120,7 +120,7 @@ module "eks_managed_node_group" {
 | <a name="input_iam_role_path"></a> [iam\_role\_path](#input\_iam\_role\_path) | IAM role path | `string` | `null` | no |
 | <a name="input_iam_role_permissions_boundary"></a> [iam\_role\_permissions\_boundary](#input\_iam\_role\_permissions\_boundary) | ARN of the policy that is used to set the permissions boundary for the IAM role | `string` | `null` | no |
 | <a name="input_iam_role_tags"></a> [iam\_role\_tags](#input\_iam\_role\_tags) | A map of additional tags to add to the IAM role created | `map(string)` | `{}` | no |
-| <a name="input_iam_role_use_name_prefix"></a> [iam\_role\_use\_name\_prefix](#input\_iam\_role\_use\_name\_prefix) | Determines whether the IAM role name (`iam_role_name`) is used as a prefix | `string` | `true` | no |
+| <a name="input_iam_role_use_name_prefix"></a> [iam\_role\_use\_name\_prefix](#input\_iam\_role\_use\_name\_prefix) | Determines whether the IAM role name (`iam_role_name`) is used as a prefix | `bool` | `true` | no |
 | <a name="input_instance_market_options"></a> [instance\_market\_options](#input\_instance\_market\_options) | The market (purchasing) option for the instance | `any` | `null` | no |
 | <a name="input_instance_types"></a> [instance\_types](#input\_instance\_types) | Set of instance types associated with the EKS Node Group. Defaults to `["t3.medium"]` | `list(string)` | `null` | no |
 | <a name="input_kernel_id"></a> [kernel\_id](#input\_kernel\_id) | The kernel ID | `string` | `null` | no |
diff --git a/modules/eks-managed-node-group/variables.tf b/modules/eks-managed-node-group/variables.tf
index 93e9555f67..5929817887 100644
--- a/modules/eks-managed-node-group/variables.tf
+++ b/modules/eks-managed-node-group/variables.tf
@@ -450,7 +450,7 @@ variable "iam_role_name" {
 
 variable "iam_role_use_name_prefix" {
   description = "Determines whether the IAM role name (`iam_role_name`) is used as a prefix"
-  type        = string
+  type        = bool
   default     = true
 }
 
diff --git a/modules/fargate-profile/README.md b/modules/fargate-profile/README.md
index 42349dd2a3..97dd0d3e53 100644
--- a/modules/fargate-profile/README.md
+++ b/modules/fargate-profile/README.md
@@ -68,7 +68,7 @@ No modules.
 | <a name="input_iam_role_path"></a> [iam\_role\_path](#input\_iam\_role\_path) | IAM role path | `string` | `null` | no |
 | <a name="input_iam_role_permissions_boundary"></a> [iam\_role\_permissions\_boundary](#input\_iam\_role\_permissions\_boundary) | ARN of the policy that is used to set the permissions boundary for the IAM role | `string` | `null` | no |
 | <a name="input_iam_role_tags"></a> [iam\_role\_tags](#input\_iam\_role\_tags) | A map of additional tags to add to the IAM role created | `map(string)` | `{}` | no |
-| <a name="input_iam_role_use_name_prefix"></a> [iam\_role\_use\_name\_prefix](#input\_iam\_role\_use\_name\_prefix) | Determines whether the IAM role name (`iam_role_name`) is used as a prefix | `string` | `true` | no |
+| <a name="input_iam_role_use_name_prefix"></a> [iam\_role\_use\_name\_prefix](#input\_iam\_role\_use\_name\_prefix) | Determines whether the IAM role name (`iam_role_name`) is used as a prefix | `bool` | `true` | no |
 | <a name="input_name"></a> [name](#input\_name) | Name of the EKS Fargate Profile | `string` | `""` | no |
 | <a name="input_selectors"></a> [selectors](#input\_selectors) | Configuration block(s) for selecting Kubernetes Pods to execute with this Fargate Profile | `any` | `[]` | no |
 | <a name="input_subnet_ids"></a> [subnet\_ids](#input\_subnet\_ids) | A list of subnet IDs for the EKS Fargate Profile | `list(string)` | `[]` | no |
diff --git a/modules/fargate-profile/variables.tf b/modules/fargate-profile/variables.tf
index 5accf35e1b..4d5e95ccbe 100644
--- a/modules/fargate-profile/variables.tf
+++ b/modules/fargate-profile/variables.tf
@@ -40,7 +40,7 @@ variable "iam_role_name" {
 
 variable "iam_role_use_name_prefix" {
   description = "Determines whether the IAM role name (`iam_role_name`) is used as a prefix"
-  type        = string
+  type        = bool
   default     = true
 }
 
diff --git a/modules/self-managed-node-group/README.md b/modules/self-managed-node-group/README.md
index 8d5f1bb2c0..af37888d34 100644
--- a/modules/self-managed-node-group/README.md
+++ b/modules/self-managed-node-group/README.md
@@ -118,7 +118,7 @@ module "self_managed_node_group" {
 | <a name="input_iam_role_path"></a> [iam\_role\_path](#input\_iam\_role\_path) | IAM role path | `string` | `null` | no |
 | <a name="input_iam_role_permissions_boundary"></a> [iam\_role\_permissions\_boundary](#input\_iam\_role\_permissions\_boundary) | ARN of the policy that is used to set the permissions boundary for the IAM role | `string` | `null` | no |
 | <a name="input_iam_role_tags"></a> [iam\_role\_tags](#input\_iam\_role\_tags) | A map of additional tags to add to the IAM role created | `map(string)` | `{}` | no |
-| <a name="input_iam_role_use_name_prefix"></a> [iam\_role\_use\_name\_prefix](#input\_iam\_role\_use\_name\_prefix) | Determines whether cluster IAM role name (`iam_role_name`) is used as a prefix | `string` | `true` | no |
+| <a name="input_iam_role_use_name_prefix"></a> [iam\_role\_use\_name\_prefix](#input\_iam\_role\_use\_name\_prefix) | Determines whether cluster IAM role name (`iam_role_name`) is used as a prefix | `bool` | `true` | no |
 | <a name="input_initial_lifecycle_hooks"></a> [initial\_lifecycle\_hooks](#input\_initial\_lifecycle\_hooks) | One or more Lifecycle Hooks to attach to the Auto Scaling Group before instances are launched. The syntax is exactly the same as the separate `aws_autoscaling_lifecycle_hook` resource, without the `autoscaling_group_name` attribute. Please note that this will only work when creating a new Auto Scaling Group. For all other use-cases, please use `aws_autoscaling_lifecycle_hook` resource | `list(map(string))` | `[]` | no |
 | <a name="input_instance_initiated_shutdown_behavior"></a> [instance\_initiated\_shutdown\_behavior](#input\_instance\_initiated\_shutdown\_behavior) | Shutdown behavior for the instance. Can be `stop` or `terminate`. (Default: `stop`) | `string` | `null` | no |
 | <a name="input_instance_market_options"></a> [instance\_market\_options](#input\_instance\_market\_options) | The market (purchasing) option for the instance | `any` | `null` | no |
diff --git a/modules/self-managed-node-group/variables.tf b/modules/self-managed-node-group/variables.tf
index c261cdcdb5..c7e04f30d5 100644
--- a/modules/self-managed-node-group/variables.tf
+++ b/modules/self-managed-node-group/variables.tf
@@ -556,7 +556,7 @@ variable "iam_role_name" {
 
 variable "iam_role_use_name_prefix" {
   description = "Determines whether cluster IAM role name (`iam_role_name`) is used as a prefix"
-  type        = string
+  type        = bool
   default     = true
 }
 
diff --git a/variables.tf b/variables.tf
index 51cd3f41d2..c5337676fb 100644
--- a/variables.tf
+++ b/variables.tf
@@ -283,7 +283,7 @@ variable "iam_role_name" {
 
 variable "iam_role_use_name_prefix" {
   description = "Determines whether the IAM role name (`iam_role_name`) is used as a prefix"
-  type        = string
+  type        = bool
   default     = true
 }