diff --git a/Gateway-config-(channel-rules).md b/Gateway-config-(channel-rules).md
index 7e01725..4249691 100644
--- a/Gateway-config-(channel-rules).md
+++ b/Gateway-config-(channel-rules).md
@@ -32,6 +32,8 @@ Below you can find how the channels (`protocolchannel` and `protocol2channel`) s
   - `channel_name`
     - the channel name as seen in the URL, not the displayname
     - https://yourmattermostserver/yourteam/channels/channel_name <- channel_name
+  - `ID:123456789`
+    - where 123456789 is the channel ID
 - msteams
   - `channel="19:82caxxxxxxxxxxxxxxxxxxxxxxxx@thread.skype"
     - as seen in the URL `?threadId=19:82abcxxxxxxxxx@thread.skype`