diff --git a/doc/api/http2.md b/doc/api/http2.md
index f02a8cb5fb3a6e..0f55ee03e42c6e 100644
--- a/doc/api/http2.md
+++ b/doc/api/http2.md
@@ -2257,6 +2257,9 @@ changes:
   * `selectPadding` {Function} When `options.paddingStrategy` is equal to
     `http2.constants.PADDING_STRATEGY_CALLBACK`, provides the callback function
     used to determine the padding. See [Using `options.selectPadding()`][].
+  * `protocol` {string} The protocol to connect with, if not set in the
+    `authority`. Value may be either `'http:'` or `'https:'`. **Default:**
+    `'https:'`
   * `settings` {HTTP/2 Settings Object} The initial settings to send to the
     remote peer upon connection.
   * `createConnection` {Function} An optional callback that receives the `URL`