diff --git a/docs/development/API/differences_in_mastoapi_responses.md b/docs/development/API/differences_in_mastoapi_responses.md
index 48a9c104c..70c31272d 100644
--- a/docs/development/API/differences_in_mastoapi_responses.md
+++ b/docs/development/API/differences_in_mastoapi_responses.md
@@ -39,6 +39,7 @@ Has these additional fields under the `pleroma` object:
 - `emoji_reactions`: A list with emoji / reaction maps. The format is `{name: "☕", count: 1, me: true}`. Contains no information about the reacting users, for that use the `/statuses/:id/reactions` endpoint.
 - `parent_visible`: If the parent of this post is visible to the user or not.
 - `pinned_at`: a datetime (iso8601) when status was pinned, `null` otherwise.
+- `non_anonymous`: true if the source post specifies the poll results are not anonymous. Currently only implemented by Smithereen.
 
 The `GET /api/v1/statuses/:id/source` endpoint additionally has the following attributes: