diff --git a/synapse/rest/client/account.py b/synapse/rest/client/account.py
index 583463890859..d39e7fcb5cd5 100644
--- a/synapse/rest/client/account.py
+++ b/synapse/rest/client/account.py
@@ -356,9 +356,7 @@ async def on_POST(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
                     "Adding emails have been disabled due to lack of an email config"
                 )
             raise SynapseError(
-                HTTPStatus.NOT_FOUND,
-                "Adding an email to your account is disabled on this server",
-                Codes.NOT_FOUND,
+                400, "Adding an email to your account is disabled on this server",
             )
 
         body = parse_and_validate_json_object_from_request(