diff --git a/website/content/api-docs/auth/approle.mdx b/website/content/api-docs/auth/approle.mdx
index 2e10ac7e6bca..24363a85965e 100644
--- a/website/content/api-docs/auth/approle.mdx
+++ b/website/content/api-docs/auth/approle.mdx
@@ -60,7 +60,8 @@ enabled while creating or updating a role.
 
 ### Parameters
 
-- `role_name` `(string: <required>)` - Name of the AppRole. Must be less than 4096 bytes.
+- `role_name` `(string: <required>)` - Name of the AppRole. Must be less than 4096 bytes, accepted characters 
+include a-Z, 0-9, space, hyphen, underscore and periods.
 - `bind_secret_id` `(bool: true)` - Require `secret_id` to be presented when
   logging in using this AppRole.
 - `secret_id_bound_cidrs` `(array: [])` - Comma-separated string or list of CIDR