diff --git a/slixmpp_omemo/__init__.py b/slixmpp_omemo/__init__.py
index 9d74a92..e423ad3 100644
--- a/slixmpp_omemo/__init__.py
+++ b/slixmpp_omemo/__init__.py
@@ -385,10 +385,10 @@ class XEP_0384(BasePlugin):
             iq = await self._generate_bundle_iq()
             try:
                 await iq.send()
-            except IqError as e:
+            except IqError as exn:
                 # TODO: Slixmpp should handle pubsub#errors so we don't have to
                 # fish the element ourselves
-                precondition = e.iq['error'].xml.find(
+                precondition = exn.iq['error'].xml.find(
                     '{%s}%s' % (PUBSUB_ERRORS, 'precondition-not-met'),
                 )
                 if precondition is not None: