diff --git a/rolesanywhere/README.md b/rolesanywhere/README.md
index 9c97f8d..9ecd7c8 100644
--- a/rolesanywhere/README.md
+++ b/rolesanywhere/README.md
@@ -30,7 +30,7 @@ module "myrole2" {
   contact_group_email = "group-email-address@census.gov"
 
 ## optional
-##  file_prefix = data.aws_iam_account_alias.current.account_alias
+##  filename_prefix = data.aws_iam_account_alias.current.account_alias
 }
 ```
 
@@ -61,10 +61,10 @@ module "myrole3" {
   ]
 }
 ```
-# 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.
 
 ## Requirements
diff --git a/rolesanywhere/main.tf b/rolesanywhere/main.tf
index 95e14ef..f284f9e 100644
--- a/rolesanywhere/main.tf
+++ b/rolesanywhere/main.tf
@@ -30,7 +30,7 @@
 *   contact_group_email = "group-email-address@census.gov"
 *
 * ## optional
-* ##  file_prefix = data.aws_iam_account_alias.current.account_alias
+* ##  filename_prefix = data.aws_iam_account_alias.current.account_alias
 * }
 * ```
 *
@@ -61,10 +61,10 @@
 *   ]
 * }
 * ```
-* # 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.
 */