diff --git a/config/user-data/edgerouter-backup.conf b/config/user-data/edgerouter-backup.conf
index 6065b82..a012d13 100644
--- a/config/user-data/edgerouter-backup.conf
+++ b/config/user-data/edgerouter-backup.conf
@@ -21,5 +21,5 @@ FNAME_BASE=$HOSTNAME
 FNAME_CONFIG=$FNAME_BASE.config.conf
 FNAME_CLI=$FNAME_BASE.commands.conf
 
-# Base filename, no extension!
+# Base filename, no .tar.gz extension!
 FNAME_BACKUP=$FNAME_BASE.backup