diff --git a/docs/curl.1 b/docs/curl.1
index 3d238e0e1..1f5389a6b 100644
--- a/docs/curl.1
+++ b/docs/curl.1
@@ -1662,6 +1662,9 @@ If this option is used several times, the last one will be used.
 .IP "--trace-time"
 Prepends a time stamp to each trace or verbose line that curl displays.
 (Added in 7.14.0)
+.IP "--unix-socket <path>"
+(HTTP) Connect through this UNIX domain socket, instead of using the
+network. (Added in 7.40.0)
 .IP "-u, --user <user:password>"
 Specify the user name and password to use for server authentication. Overrides
 \fI-n, --netrc\fP and \fI--netrc-optional\fP.