diff --git a/xep-0247.xml b/xep-0247.xml
index 593a7c26..7a00c1f0 100644
--- a/xep-0247.xml
+++ b/xep-0247.xml
@@ -124,7 +124,7 @@
           sid='a73sjjvkla37jfea'>
     <content creator='initiator' name='stub'>
       <description xmlns='urn:xmpp:jingle:apps:stub:0'/>
-      <transport xmlns='urn:xmpp:jingle:transports:s5b:0'
+      <transport xmlns='urn:xmpp:jingle:transports:ibb:0'
                  block-size='4096'
                  sid='vj3hs98y'/>
     </content>