--- a/src/plugins/plugin_xep_0163.py	Mon Apr 11 12:47:35 2011 +0200
+++ b/src/plugins/plugin_xep_0163.py	Tue Apr 12 20:40:47 2011 +0200
@@ -62,14 +62,15 @@
         disco_info.extend(map(disco.DiscoFeature, self.pep_events))
         return True
 
-    def addPEPEvent(self, event_type, name, in_callback, out_callback, notify = True):
+    def addPEPEvent(self, event_type, name, in_callback, out_callback = None, notify = True):
         """Add a Personal Eventing Protocol event manager
         @param event_type: type of the event (always uppercase), can be MOOD, TUNE, etc
         @param name: namespace of the node (e.g. http://jabber.org/protocol/mood for User Mood)
         @param in_callback: method to call when this event occur
         @param out_callback: method to call when we want to publish this event
         @param notify: add autosubscribe (+notify) if True"""
-        self.pep_out_cb[event_type]=out_callback
+        if out_callback:
+            self.pep_out_cb[event_type] = out_callback
         self.pep_events.add(name)
         if notify:
             self.pep_events.add(name+"+notify")