diff --git a/changelogs/client_server/newsfragments/1938.clarification b/changelogs/client_server/newsfragments/1938.clarification
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+The `reason` parameter in `POST /_matrix/client/v3/rooms/{roomId}/report/{eventId}` can be omitted instead of left blank as per MSC2414.
diff --git a/changelogs/client_server/newsfragments/1938.new b/changelogs/client_server/newsfragments/1938.new
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+Add `POST /_matrix/client/v3/rooms/{roomId}/report` as per MSC4151.