diff --git a/inbox/fastmuc.xml b/inbox/fastmuc.xml
index 94ea193f..edb99b5b 100644
--- a/inbox/fastmuc.xml
+++ b/inbox/fastmuc.xml
@@ -37,7 +37,7 @@ Appropriate action - alert user, attempt to rejoin MUC, whatever.
 </section1>
 
 <section1 topic='Discovery' anchor='discovery'>
-  <p>MUC Rooms supporting this should have a disco feature of "urn:xmpp:mfr" in caps.</p>
+  <p>MUC Rooms supporting this should have a disco feature of "urn:xmpp:presence-session:0" in caps.</p>
   <p>To avoid extra roundtrips for discovery, clients may speculatively send elements when initially joining a MUC, and treat the absense of appropriate elements in the responses to indicate a lack of support.</p>
 </section1>
 
@@ -49,7 +49,7 @@ Appropriate action - alert user, attempt to rejoin MUC, whatever.
     from='romeo@montague.lit/lane'
     to='orchard@chat.capulet.lit/Romeo'>
   <x xmlns='http://jabber.org/protocol/muc'/>
-  <presence-session xmlns="urn:xmpp:pressence-session:0"/>
+  <presence-session xmlns="urn:xmpp:presence-session:0"/>
 </presence>
 ]]></example>
     <p>If a client has indicated that it's using MUC Fast Reconnect on its session, the MUC service MUST annotate the presence stanzas it sends with elements containing a presence-session element with namespace "urn:xmpp:presence-session:0", a "session" attribute and an "id" attribute, described below.</p>
@@ -60,7 +60,7 @@ Appropriate action - alert user, attempt to rejoin MUC, whatever.
   <x xmlns='http://jabber.org/protocol/muc#user'>
     <item affiliation='owner' role='moderator'/>
   </x>
-  <presence-session xmlns="urn:xmpp:pressence-session:0" session="u8e8t2thu" id="893oehh"/>
+  <presence-session xmlns="urn:xmpp:presence-session:0" session="u8e8t2thu" id="893oehh"/>
 </presence>
 ]]></example>
     <p>Attributes:</p>
@@ -76,7 +76,7 @@ Appropriate action - alert user, attempt to rejoin MUC, whatever.
     from='romeo@montague.lit/lane'
     to='orchard@chat.capulet.lit/Romeo'>
   <x xmlns='http://jabber.org/protocol/muc'/>
-  <presence-session-resume xmlns="urn:xmpp:pressence-session:0" session="u8e8t2thu" id="893oehh"/>
+  <presence-session-resume xmlns="urn:xmpp:presence-session:0" session="u8e8t2thu" id="893oehh"/>
 </presence>
 ]]></example>
     <p>When the MUC room receives a room fast rejoin request, it must either first send an 'unavailable' presence from the room's bare JID, followed by a normal full join, as above, or instead of sending the full presence list for all occupants, only send those stanzas needed to get from the state represented by the client-provided session and id to the current state. All the presence stanzas (apart from the unavailable one used to reset state before a clean join) MUST contain the presence-session element as described above.</p>