--- a/mod_rest/README.markdown	Mon Dec 30 05:14:49 2019 +0100
+++ b/mod_rest/README.markdown	Mon Dec 30 05:17:18 2019 +0100
@@ -82,6 +82,9 @@
 To accept the stanza without returning a reply, respond with HTTP status
 code `202` or `204`.
 
+HTTP status codes in the `4xx` and `5xx` range are mapped to an
+appropriate stanza error.
+
 For full control over the response, set the `Content-Type` header to
 `application/xmpp+xml` and return an XMPP stanza as an XML snippet.