diff --git a/nixos/modules/services/web-servers/nginx/vhost-options.nix b/nixos/modules/services/web-servers/nginx/vhost-options.nix
index f014d817e80..e4494dff37d 100644
--- a/nixos/modules/services/web-servers/nginx/vhost-options.nix
+++ b/nixos/modules/services/web-servers/nginx/vhost-options.nix
@@ -62,6 +62,7 @@ with lib;
         This is useful if you have many subdomains and want to avoid hitting the
         <link xlink:href="https://letsencrypt.org/docs/rate-limits/">rate limit</link>.
         Alternately, you can generate a certificate through <option>enableACME</option>.
+        <emphasis>Note that this option does not create any certificates, nor it does add subdomains to existing ones – you will need to create them manually using  <xref linkend="opt-security.acme.certs"/>.</emphasis>
       '';
     };