diff --git a/develop-docs/sdk/telemetry/attachments.mdx b/develop-docs/sdk/telemetry/attachments.mdx
index ea79d38e58069..e6d13d4be7c23 100644
--- a/develop-docs/sdk/telemetry/attachments.mdx
+++ b/develop-docs/sdk/telemetry/attachments.mdx
@@ -255,7 +255,7 @@ SDKs **SHOULD** send placeholders in the same envelope as the event the file is
 | `attachment_length` | Integer | **REQUIRED** | Size of the referenced attachment in bytes. |
 | `filename` | String | **REQUIRED** | The name of the uploaded file without a path component. |
 
-The item header **MAY** also contain `attachment_type` and the original file's `content_type` as an additional field (see [Standard Attachment Item](#standard-attachment-item)).
+The item header **MUST** also contain the original file's `attachment_type` if it was set. The item payload **MUST** contain the original file's `content_type` as a field in the JSON object (see [Standard Attachment Item](#standard-attachment-item)).
 
 **Item payload:**