diff --git a/docs/user/usage.rst b/docs/user/usage.rst
index a56efdf8..86792ed6 100644
--- a/docs/user/usage.rst
+++ b/docs/user/usage.rst
@@ -224,7 +224,7 @@ Read config from config.ini and put to stdout::
     tags: tag1,tag2
     add_field: fieldname1,fieldvalue1[,fieldname2,fieldvalue2, ...]
 
-    ; follow all logs in /var/log except those with `messages` or `secure` in the name.
+    ; follow all logs in /var/log except those with `messages` or `secure` in the name *of the file*. Currently it is not possible to exclude certain lines of a file.
     ; The exclude tag must be a valid python regular expression.
     [/var/log/*log]
     type: syslog