diff --git a/doc/api/errors.md b/doc/api/errors.md
index 86b5a34d023158..8066e163b58f70 100644
--- a/doc/api/errors.md
+++ b/doc/api/errors.md
@@ -3189,7 +3189,7 @@ changes:
 -->
 
 Too much HTTP header data was received. In order to protect against malicious or
-malconfigured clients, if more than 8 KiB of HTTP header data is received then
+malconfigured clients, if more than `maxHeaderSize` of HTTP header data is received then
 HTTP parsing will abort without a request or response object being created, and
 an `Error` with this code will be emitted.