diff --git a/omemo/omemo/litesessionstore.py b/omemo/omemo/litesessionstore.py
index 062f5175986512ec6eb657e0993001108c2c894b..24c23e9483ad140deb455de3f5491806ee41a632 100644
--- a/omemo/omemo/litesessionstore.py
+++ b/omemo/omemo/litesessionstore.py
@@ -54,7 +54,7 @@ class LiteSessionStore(SessionStore):
         c.execute(q, (device_id, ))
         result = c.fetchone()
 
-        return result[0].decode('utf-8')
+        return result[0].decode('utf-8') if result else None
 
     def getActiveDeviceTuples(self):
         q = "SELECT recipient_id, device_id FROM sessions WHERE active = 1"