From 424079aa128de691b4f5d4094ef46550de701d65 Mon Sep 17 00:00:00 2001
From: Lonami Exo <totufals@hotmail.com>
Date: Tue, 4 Dec 2018 21:07:18 +0100
Subject: [PATCH] Fix pts initialized as -1 not being considered

---
 telethon/client/updates.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/telethon/client/updates.py b/telethon/client/updates.py
index 2511a5ca..5bb47b24 100644
--- a/telethon/client/updates.py
+++ b/telethon/client/updates.py
@@ -133,7 +133,7 @@ class UpdateMethods(UserMethods):
         This can also be used to forcibly fetch new updates if there are any.
         """
         state = self.session.get_update_state(0)
-        if not state or not state.pts:
+        if not state or state.pts <= 0:
             state = await self(functions.updates.GetStateRequest())
 
         self.session.catching_up = True