diff --git a/Retrieving-all-chat-members.md b/Retrieving-all-chat-members.md
index 5c30cb2..030d88f 100644
--- a/Retrieving-all-chat-members.md
+++ b/Retrieving-all-chat-members.md
@@ -13,7 +13,7 @@ all_participants = []
 
 while True:
     participants = client.invoke(GetParticipantsRequest(
-        channel, ChannelParticipantsSearch(''), offset, limit
+        channel, ChannelParticipantsSearch(''), offset, limit, hash=0
     ))
     if not participants.users:
         break
@@ -22,4 +22,6 @@ while True:
     # sleep(1)  # This line seems to be optional, no guarantees!
 ```
 
-Note that `GetParticipantsRequest` returns [`ChannelParticipants`](https://lonamiwebs.github.io/Telethon/constructors/channels/channel_participants.html), which may have more information you need (like the role of the participants, total count of members, etc.)
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+Note that `GetParticipantsRequest` returns [`ChannelParticipants`](https://lonamiwebs.github.io/Telethon/constructors/channels/channel_participants.html), which may have more information you need (like the role of the participants, total count of members, etc.)
+
+The `hash` of the request is **not** the channel hash. It's a special hash calculated based on the participants you already know about, so Telegram can avoid resending the whole thing. You can just leave it to 0.
\ No newline at end of file