diff --git a/controllers/nginx/configuration.md b/controllers/nginx/configuration.md
index 333201057..fa6a022da 100644
--- a/controllers/nginx/configuration.md
+++ b/controllers/nginx/configuration.md
@@ -283,8 +283,6 @@ Example usage: `custom-http-errors: 404,415`
 **enable-dynamic-tls-records:** Enables dynamically sized TLS records to improve time-to-first-byte. Enabled by default. See [CloudFlare's blog](https://blog.cloudflare.com/optimizing-tls-over-tcp-to-reduce-latency) for more information.
 
 
-**enable-underscores-in-headers:** Enables underscores in header names. This is disabled by default.
-
 **enable-underscores-in-headers:** Enables underscores in header names. This is disabled by default.
 
 **enable-vts-status:** Allows the replacement of the default status page with a third party module named [nginx-module-vts](https://github.com/vozlt/nginx-module-vts).