diff --git a/inbox/automatic-trust-transfer.xml b/inbox/automatic-trust-transfer.xml
index a70d4ee3..1a0e9d6b 100644
--- a/inbox/automatic-trust-transfer.xml
+++ b/inbox/automatic-trust-transfer.xml
@@ -147,7 +147,7 @@
 <section1 topic='Trust Message URI Types' anchor='trust-message'>
 	<section2 topic='Trust Message URI' anchor='trust-message'>
 		<p>
-			A trust message contains an XMPP URI defined by the following scheme:
+			A trust message contains an XMPP URI (see &xep0147;) defined by the following scheme:
 		</p>
 		<example caption='Scheme of a Trust Message URI'><![CDATA[xmpp:<bare-jid>?omemo-trust;<auth|revoke>=<key-identifier-1>;<auth|revoke>=<key-identifier-2>;<...>;<auth|revoke>=<key-identifier-n>]]></example>
 		<example caption='Example of a Trust Message URI'><![CDATA[xmpp:user@example.org?omemo-trust;auth=623548d3835c6d33ef5cb680f7944ef381cf712bf23a0119dabe5c4f252cd02f;auth=d9f849b6b828309c5f2c8df4f38fd891887da5aaa24a22c50d52f69b4a80817e;revoke=b423f5088de9a924d51b31581723d850c7cc67d0a4fe6b267c3d301ff56d2413]]></example>