diff --git a/pyrogram/client/client.py b/pyrogram/client/client.py
index f8bc4e4d..89bab694 100644
--- a/pyrogram/client/client.py
+++ b/pyrogram/client/client.py
@@ -651,8 +651,9 @@ class Client:
                                     )
                                 )
 
-                                updates.users += diff.users
-                                updates.chats += diff.chats
+                                if not isinstance(diff, types.updates.ChannelDifferenceEmpty):
+                                    updates.users += diff.users
+                                    updates.chats += diff.chats
 
                         if channel_id and pts:
                             if channel_id not in self.channels_pts: