diff --git a/slixmpp_omemo/__init__.py b/slixmpp_omemo/__init__.py
index d4d9bba..cc1cec3 100644
--- a/slixmpp_omemo/__init__.py
+++ b/slixmpp_omemo/__init__.py
@@ -302,7 +302,9 @@ class XEP_0384(BasePlugin):
         self._store_device_ids(bare_jid, items)
 
         items = list(items)
-        device_ids = [int(d['id']) for d in items[0]['devices']]
+        device_ids = []
+        if items:
+            device_ids = [int(d['id']) for d in items[0]['devices']]
 
         if bare_jid == self.xmpp.boundjid.bare and \
            self._device_id not in device_ids: