diff --git a/README.MD b/README.MD
index 718a575..14f7e93 100644
--- a/README.MD
+++ b/README.MD
@@ -52,7 +52,7 @@ The script uses several files for configuration:
   - `**` allows up to six additional characters.
   - `#` at the start includes numeric characters (up to three).
   - `##` includes numeric characters (up to six).
-- `channels.txt`: List of channel usernames (the part after `t.me/`) to monitor.
+- `channels.txt`: List of channel usernames (the part after `t.me/`) to monitor (NB You need to JOIN the channel you want to monitor).
 
 ### Examples