diff --git a/sat/plugins/plugin_xep_0060.py b/sat/plugins/plugin_xep_0060.py
index e6f0162b..944eab80 100644
--- a/sat/plugins/plugin_xep_0060.py
+++ b/sat/plugins/plugin_xep_0060.py
@@ -79,6 +79,9 @@ class XEP_0060(object):
     ACCESS_PUBLISHER_ROSTER = "publisher-roster"
     ACCESS_AUTHORIZE = "authorize"
     ACCESS_WHITELIST = "whitelist"
+    PUBLISH_MODEL_PUBLISHERS = "publishers"
+    PUBLISH_MODEL_SUBSCRIBERS = "subscribers"
+    PUBLISH_MODEL_OPEN = "open"
     ID_SINGLETON = "current"
     EXTRA_PUBLISH_OPTIONS = "publish_options"
     EXTRA_ON_PRECOND_NOT_MET = "on_precondition_not_met"