diff --git a/Doc/library/http.client.rst b/Doc/library/http.client.rst
index 3632242..3d37c1b 100644
--- a/Doc/library/http.client.rst
+++ b/Doc/library/http.client.rst
@@ -386,6 +386,12 @@
 
    .. versionadded:: 2.7
 
+.. method:: HTTPConnection.set_tunnel(host, port=None)
+
+   Set the host and the port for HTTP Connect Tunnelling. Normally used when it
+   is required to a HTTPS Connection through a proxy server.
+
+   .. versionadded:: 3.1
 
 .. method:: HTTPConnection.connect()