diff --git a/telethon/network/mtproto_sender.py b/telethon/network/mtproto_sender.py
index 33794167..b775ae92 100644
--- a/telethon/network/mtproto_sender.py
+++ b/telethon/network/mtproto_sender.py
@@ -490,6 +490,7 @@ class MtProtoSender:
         """
         new_session = reader.tgread_object()
         assert isinstance(new_session, NewSessionCreated)
+        self.session.salt = new_session.server_salt
         # TODO https://goo.gl/LMyN7A
         return True