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-rw-r--r--slixmpp/plugins/xep_0091/stanza.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/slixmpp/plugins/xep_0091/stanza.py b/slixmpp/plugins/xep_0091/stanza.py
index ac6457e6..0ce2acda 100644
--- a/slixmpp/plugins/xep_0091/stanza.py
+++ b/slixmpp/plugins/xep_0091/stanza.py
@@ -18,7 +18,7 @@ class LegacyDelay(ElementBase):
name = 'x'
namespace = 'jabber:x:delay'
plugin_attrib = 'legacy_delay'
- interfaces = set(('from', 'stamp', 'text'))
+ interfaces = {'from', 'stamp', 'text'}
def get_from(self):
from_ = self._get_attr('from')