diff --git a/docs/event_index.rst b/docs/event_index.rst
index 1257fcd1..ee8f5a95 100644
--- a/docs/event_index.rst
+++ b/docs/event_index.rst
@@ -12,7 +12,7 @@ Event Index
         has not yet been established.
 
     connection_failed
-        - **Data:** ``{}``
+        - **Data:** ``{}`` or ``Failure Stanza`` if available
         - **Source:** :py:class:`~sleekxmpp.xmlstream.XMLstream`
 
         Signal that a connection can not be established after number of attempts.
diff --git a/sleekxmpp/features/feature_mechanisms/mechanisms.py b/sleekxmpp/features/feature_mechanisms/mechanisms.py
index 2ed3e00b..58ed9b91 100644
--- a/sleekxmpp/features/feature_mechanisms/mechanisms.py
+++ b/sleekxmpp/features/feature_mechanisms/mechanisms.py
@@ -235,6 +235,6 @@ class FeatureMechanisms(BasePlugin):
         """SASL authentication failed. Disconnect and shutdown."""
         self.attempted_mechs.add(self.mech.name)
         log.info("Authentication failed: %s", stanza['condition'])
-        self.xmpp.event("failed_auth", direct=True)
+        self.xmpp.event("failed_auth", stanza, direct=True)
         self._send_auth()
         return True