diff --git a/sleekxmpp/plugins/xep_0256.py b/sleekxmpp/plugins/xep_0256.py
index 265a5da8..e2ec936c 100644
--- a/sleekxmpp/plugins/xep_0256.py
+++ b/sleekxmpp/plugins/xep_0256.py
@@ -9,6 +9,7 @@
 import logging
 
 from sleekxmpp import Presence
+from sleekxmpp.exceptions import XMPPError
 from sleekxmpp.plugins import BasePlugin, register_plugin
 from sleekxmpp.xmlstream import register_stanza_plugin