2 files changed, 12 insertions, 5 deletions
diff --git a/docs/cmdline-opts/header.d b/docs/cmdline-opts/header.d
index 90af7359e..d8292ed77 100644
--- a/docs/cmdline-opts/header.d
+++ b/docs/cmdline-opts/header.d
@@ -1,10 +1,9 @@
 Long: header
 Short: H
-Arg: <header>
-Help: Pass custom header LINE to server
+Arg: <header/@file>
+Help: Pass custom header(s) to server
 Protocols: HTTP
 ---
-
 Extra header to include in the request when sending HTTP to a server. You may
 specify any number of extra headers. Note that if you should add a custom
 header that has the same name as one of the internal ones curl would use, your
@@ -21,6 +20,10 @@ end-of-line marker, you should thus \fBnot\fP add that as a part of the header
 content: do not add newlines or carriage returns, they will only mess things up
 for you.
 
+Starting in 7.55.0, this option can take an argument in @filename style, which
+then adds a header for each line in the input file. Using @- will make curl
+read the header file from stdin.
+
 See also the --user-agent and --referer options.
 
 Starting in 7.37.0, you need --proxy-header to send custom headers intended
diff --git a/docs/cmdline-opts/proxy-header.d b/docs/cmdline-opts/proxy-header.d
index 1ef696bc7..c1b0bb7c4 100644
--- a/docs/cmdline-opts/proxy-header.d
+++ b/docs/cmdline-opts/proxy-header.d
@@ -1,6 +1,6 @@
 Long: proxy-header
-Arg: <header>
-Help: Pass custom header LINE to proxy
+Arg: <header/@file>
+Help: Pass custom header(s) to proxy
 Protocols: HTTP
 Added: 7.37.0
 ---
@@ -17,4 +17,8 @@ up for you.
 Headers specified with this option will not be included in requests that curl
 knows will not be sent to a proxy.
 
+Starting in 7.55.0, this option can take an argument in @filename style, which
+then adds a header for each line in the input file. Using @- will make curl
+read the header file from stdin.
+
 This option can be used multiple times to add/replace/remove multiple headers.