diff --git a/acmpca-iam-rolesanywhere/README.md b/acmpca-iam-rolesanywhere/README.md
index 7422d95..dfeb485 100644
--- a/acmpca-iam-rolesanywhere/README.md
+++ b/acmpca-iam-rolesanywhere/README.md
@@ -29,8 +29,8 @@ module "certificate" {
 ## optional
 ##  certificate_subject_ou = "IAM RolesAnywhere EDL"
 ##  validity_days = 30
-##  file_prefix = data.aws_iam_account_alias.current.account_alias
-##  file_prefix_seprator = "_"
+##  filename_prefix = data.aws_iam_account_alias.current.account_alias
+##  filename_prefix_seprator = "_"
 
   tags = merge(
     local.base_tags,
@@ -42,10 +42,10 @@ module "certificate" {
 }
 ```
 
-# Usage: file\_prefix and file\_prefix\_separator
+# Usage: filename\_prefix and filename\_prefix\_separator
 Use this if you want to clearly separate the output files for common role names across multiple accounts.  A recommended value
 here is the AWS Account Alias, which you can get from the `data` resource `aws_iam_account_alias.account_alias` (see example above).
-If you pass a value, it will use this value along with the value of `file_prefix_separator` (by default, a dot).  By default, the
+If you pass a value, it will use this value along with the value of `filename_prefix_separator` (by default, a dot).  By default, the
 prefix is not used.
 
 # Sample Output Fields
diff --git a/acmpca-iam-rolesanywhere/main.tf b/acmpca-iam-rolesanywhere/main.tf
index c175a31..413bb68 100644
--- a/acmpca-iam-rolesanywhere/main.tf
+++ b/acmpca-iam-rolesanywhere/main.tf
@@ -29,8 +29,8 @@
 * ## optional
 * ##  certificate_subject_ou = "IAM RolesAnywhere EDL"
 * ##  validity_days = 30
-* ##  file_prefix = data.aws_iam_account_alias.current.account_alias
-* ##  file_prefix_seprator = "_"
+* ##  filename_prefix = data.aws_iam_account_alias.current.account_alias
+* ##  filename_prefix_seprator = "_"
 *
 *   tags = merge(
 *     local.base_tags,
@@ -42,10 +42,10 @@
 * }
 * ```
 *
-* # Usage: file_prefix and file_prefix_separator
+* # Usage: filename_prefix and filename_prefix_separator
 * Use this if you want to clearly separate the output files for common role names across multiple accounts.  A recommended value
 * here is the AWS Account Alias, which you can get from the `data` resource `aws_iam_account_alias.account_alias` (see example above).
-* If you pass a value, it will use this value along with the value of `file_prefix_separator` (by default, a dot).  By default, the
+* If you pass a value, it will use this value along with the value of `filename_prefix_separator` (by default, a dot).  By default, the
 * prefix is not used.
 *
 * # Sample Output Fields