diff --git a/README.md b/README.md
index b99497c..ad73f13 100644
--- a/README.md
+++ b/README.md
@@ -79,7 +79,7 @@ The arguments are:
 	- `cors`: allow Cross-origin resource sharing (allows XHR calls from other servers)
 	- `html`: changes the http content-type to html, so that python cgi erros (written in html) are readable in a web browser
 	- `txt`: changes the http content-type to txt (for faster "`view-source:`")
-- Custom feeds: you can turn any HTML page into a RSS feed using morss, using xpath rules. The article content will be fetched as usual (with readabilite)
+- Custom feeds: you can turn any HTML page into a RSS feed using morss, using xpath rules. The article content will be fetched as usual (with readabilite). Please note that you will have to **replace** any `/` in your rule with a `|` when using morss as a webserver
 	- `items`: (**mandatory** to activate the custom feeds function) xpath rule to match all the RSS entries
 	- `item_link`: xpath rule relative to `items` to point to the entry's link
 	- `item_title`: entry's title