diff --git a/doc/api/stream.md b/doc/api/stream.md
index 1e87af4d8f6677..a4f8ed6e5aedab 100644
--- a/doc/api/stream.md
+++ b/doc/api/stream.md
@@ -2579,6 +2579,9 @@ further errors except from `_destroy()` may be emitted as `'error'`.
 <!-- YAML
 added: v10.0.0
 changes:
+  - version: v18.14.0
+    pr-url: https://github.com/nodejs/node/pull/46205
+    description: Added support for `ReadableStream` and `WritableStream`.
   - version: v15.11.0
     pr-url: https://github.com/nodejs/node/pull/37354
     description: The `signal` option was added.
@@ -2598,7 +2601,9 @@ changes:
                  finished before the call to `finished(stream, cb)`.
 -->
 
-* `stream` {Stream} A readable and/or writable stream.
+* `stream` {Stream|ReadableStream|WritableStream}
+
+A readable and/or writable stream/webstream.
 
 * `options` {Object}
   * `error` {boolean} If set to `false`, then a call to `emit('error', err)` is
@@ -3022,10 +3027,16 @@ added: v17.0.0
 
 <!-- YAML
 added: v16.8.0
+changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/46190
+    description: The `src` argument can now be a `ReadableStream` or
+                 `WritableStream`.
 -->
 
 * `src` {Stream|Blob|ArrayBuffer|string|Iterable|AsyncIterable|
-  AsyncGeneratorFunction|AsyncFunction|Promise|Object}
+  AsyncGeneratorFunction|AsyncFunction|Promise|Object|
+  ReadableStream|WritableStream}
 
 A utility method for creating duplex streams.
 
@@ -3045,6 +3056,8 @@ A utility method for creating duplex streams.
   `writable` into `Stream` and then combines them into `Duplex` where the
   `Duplex` will write to the `writable` and read from the `readable`.
 * `Promise` converts into readable `Duplex`. Value `null` is ignored.
+* `ReadableStream` converts into readable `Duplex`.
+* `WritableStream` converts into writable `Duplex`.
 * Returns: {stream.Duplex}
 
 If an `Iterable` object containing promises is passed as an argument,