Adding parameters to a .htaccess redirect

I’m trying to redirect a url but I can’t seem to make it work for some reason. I’m trying to redirect my.domain.com/rss/abc/ to my.domain.com/rss/abc/?type=555

I’ve put this in my .htaccess

RewriteEngine On
# Redirects rss
RewriteCond %{QUERY_STRING} ^$
RewriteRule ^/rss/abc/?$ /rss/abc/?type=555 [R=301,L]

Any pointers ? This is on a old Typo3 site. Anyway it could hijack the request before doing the redirect ?

>Solution :

I can only recommend to use some kind of online htaccess rewrite rule checker, for example https://htaccess.madewithlove.com/ (not the only one, and no real preferance or recommendation about others).

Your rewrite rule is wrong, it should be:

RewriteEngine On
# Redirects rss
RewriteCond %{QUERY_STRING} ^$
RewriteRule ^rss/abc/?$ /rss/abc/?type=555 [R=301,L]