diff --git a/docs/curl.1 b/docs/curl.1
index 1d091e6fc609f3bc903546a6b080b40746bc4c5e..f1969e436fbd8d8cec55e6d977f5a03d6fe62b1f 100644
--- a/docs/curl.1
+++ b/docs/curl.1
@@ -644,6 +644,9 @@ Forces curl to use SSL version 3 when negotiating with a remote SSL server.
 .IP "-2/--sslv2"
 (HTTPS)
 Forces curl to use SSL version 2 when negotiating with a remote SSL server.
+.IP "-0/--http1.0"
+(HTTP) Forces curl to issue its requests using HTTP 1.0 instead of using its
+internally preferred: HTTP 1.1.
 .IP "-#/--progress-bar"
 Make curl display progress information as a progress bar instead of the
 default statistics.