LONDON — When it comes to one-tweet shutdowns from British novelists, J.K. Rowling has always been up there on the number one spot.

But it looks like she may have a challenger.

Scottish crime writer Val McDermid received the following tweet on Tuesday, from a reader who apparently didn't like the fact that she's a feminist.

@valmcdermid I enjoyed some of your books but since discovering that you are a #feminist I've decided not to buy/read any more of them. — Thruppence (@ThreeNSixPlease) August 16, 2016

When replying, McDermid didn't mess around.

Your loss. You probably struggled with them anyway https://t.co/QgFuqWWY9n — Val McDermid (@valmcdermid) August 16, 2016

Unsurprisingly, Rowling was one of the first people to offer her support.

@valmcdermid @ThreeNSixPlease Not to worry, Val, I'll order two of every copy from now on 😂 — J.K. Rowling (@jk_rowling) August 16, 2016

Others were quick to rally behind her, too.

@jk_rowling @valmcdermid @ThreeNSixPlease To be fair Val's kept that feminist stuff pretty quiet. Apart from campaigning/writing/inspiring.. — Muriel Gray (@ArtyBagger) August 16, 2016

@ArtyBagger @valmcdermid @ThreeNSixPlease Yeah, she's one of those stealth feminists who lure you in by writing books you enjoy. #dangerous — J.K. Rowling (@jk_rowling) August 16, 2016

More and more people came to McDermid's support.

@valmcdermid @ThreeNSixPlease Gonna be hard to find an author to read. Every decent one I know is a feminist. Bye. — Harlan Coben (@HarlanCoben) August 16, 2016

@valmcdermid @ThreeNSixPlease that's okay, since I've seen this retweeted I've decided to read all of your books :) — Hollie (@hollieos2408) August 16, 2016

@valmcdermid I'm looking for some decent holiday reading. I'll add you to my list. Swings & roundabouts, eh. — Rachel B. (@notRachelBrown) August 16, 2016

McDermid has basically killed two birds with one stone: shut down a troll, and earned a bunch of new fans in the process.

All in less than 140 characters.