diff --git a/packages/react-dom/src/server/ReactDOMLegacyServerNode.classic.fb.js b/packages/react-dom/src/server/ReactDOMLegacyServerNode.classic.fb.js
new file mode 100644
index 000000000000..f542d77e295a
--- /dev/null
+++ b/packages/react-dom/src/server/ReactDOMLegacyServerNode.classic.fb.js
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+export {
+  renderToString,
+  renderToStaticMarkup,
+  version,
+} from './ReactDOMServerLegacyPartialRendererBrowser';
+
+export {
+  renderToNodeStream,
+  renderToStaticNodeStream,
+} from './ReactDOMLegacyServerNodeStream';
diff --git a/packages/react-dom/src/server/ReactDOMLegacyServerNode.js b/packages/react-dom/src/server/ReactDOMLegacyServerNode.js
index 26777fdc452c..20e89de8b430 100644
--- a/packages/react-dom/src/server/ReactDOMLegacyServerNode.js
+++ b/packages/react-dom/src/server/ReactDOMLegacyServerNode.js
@@ -9,102 +9,16 @@
 
 import type {ReactNodeList} from 'shared/ReactTypes';
 
-import type {Request} from 'react-server/src/ReactFizzServer';
-
-import {
-  createRequest,
-  startWork,
-  startFlowing,
-  abort,
-} from 'react-server/src/ReactFizzServer';
-
-import {
-  createResponseState,
-  createRootFormatContext,
-} from './ReactDOMServerLegacyFormatConfig';
-
 import {version, renderToStringImpl} from './ReactDOMLegacyServerImpl';
-
-import {Readable} from 'stream';
+import {
+  renderToNodeStream,
+  renderToStaticNodeStream,
+} from './ReactDOMLegacyServerNodeStream';
 
 type ServerOptions = {
   identifierPrefix?: string,
 };
 
-class ReactMarkupReadableStream extends Readable {
-  request: Request;
-  startedFlowing: boolean;
-  constructor() {
-    // Calls the stream.Readable(options) constructor. Consider exposing built-in
-    // features like highWaterMark in the future.
-    super({});
-    this.request = (null: any);
-    this.startedFlowing = false;
-  }
-
-  _destroy(err, callback) {
-    abort(this.request);
-    // $FlowFixMe: The type definition for the callback should allow undefined and null.
-    callback(err);
-  }
-
-  _read(size) {
-    if (this.startedFlowing) {
-      startFlowing(this.request, this);
-    }
-  }
-}
-
-function onError() {
-  // Non-fatal errors are ignored.
-}
-
-function renderToNodeStreamImpl(
-  children: ReactNodeList,
-  options: void | ServerOptions,
-  generateStaticMarkup: boolean,
-): Readable {
-  function onAllReady() {
-    // We wait until everything has loaded before starting to write.
-    // That way we only end up with fully resolved HTML even if we suspend.
-    destination.startedFlowing = true;
-    startFlowing(request, destination);
-  }
-  const destination = new ReactMarkupReadableStream();
-  const request = createRequest(
-    children,
-    createResponseState(false, options ? options.identifierPrefix : undefined),
-    createRootFormatContext(),
-    Infinity,
-    onError,
-    onAllReady,
-    undefined,
-    undefined,
-  );
-  destination.request = request;
-  startWork(request);
-  return destination;
-}
-
-function renderToNodeStream(
-  children: ReactNodeList,
-  options?: ServerOptions,
-): Readable {
-  if (__DEV__) {
-    console.error(
-      'renderToNodeStream is deprecated. Use renderToPipeableStream instead.',
-    );
-  }
-  return renderToNodeStreamImpl(children, options, false);
-}
-
-function renderToStaticNodeStream(
-  children: ReactNodeList,
-  options?: ServerOptions,
-): Readable {
-  return renderToNodeStreamImpl(children, options, true);
-}
-
 function renderToString(
   children: ReactNodeList,
   options?: ServerOptions,
diff --git a/packages/react-dom/src/server/ReactDOMLegacyServerNodeStream.js b/packages/react-dom/src/server/ReactDOMLegacyServerNodeStream.js
new file mode 100644
index 000000000000..25b88156e075
--- /dev/null
+++ b/packages/react-dom/src/server/ReactDOMLegacyServerNodeStream.js
@@ -0,0 +1,106 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+import type {ReactNodeList} from 'shared/ReactTypes';
+
+import type {Request} from 'react-server/src/ReactFizzServer';
+
+import {
+  createRequest,
+  startWork,
+  startFlowing,
+  abort,
+} from 'react-server/src/ReactFizzServer';
+
+import {
+  createResponseState,
+  createRootFormatContext,
+} from './ReactDOMServerLegacyFormatConfig';
+
+import {Readable} from 'stream';
+
+type ServerOptions = {
+  identifierPrefix?: string,
+};
+
+class ReactMarkupReadableStream extends Readable {
+  request: Request;
+  startedFlowing: boolean;
+  constructor() {
+    // Calls the stream.Readable(options) constructor. Consider exposing built-in
+    // features like highWaterMark in the future.
+    super({});
+    this.request = (null: any);
+    this.startedFlowing = false;
+  }
+
+  _destroy(err, callback) {
+    abort(this.request);
+    // $FlowFixMe: The type definition for the callback should allow undefined and null.
+    callback(err);
+  }
+
+  _read(size) {
+    if (this.startedFlowing) {
+      startFlowing(this.request, this);
+    }
+  }
+}
+
+function onError() {
+  // Non-fatal errors are ignored.
+}
+
+function renderToNodeStreamImpl(
+  children: ReactNodeList,
+  options: void | ServerOptions,
+  generateStaticMarkup: boolean,
+): Readable {
+  function onAllReady() {
+    // We wait until everything has loaded before starting to write.
+    // That way we only end up with fully resolved HTML even if we suspend.
+    destination.startedFlowing = true;
+    startFlowing(request, destination);
+  }
+  const destination = new ReactMarkupReadableStream();
+  const request = createRequest(
+    children,
+    createResponseState(false, options ? options.identifierPrefix : undefined),
+    createRootFormatContext(),
+    Infinity,
+    onError,
+    onAllReady,
+    undefined,
+    undefined,
+  );
+  destination.request = request;
+  startWork(request);
+  return destination;
+}
+
+function renderToNodeStream(
+  children: ReactNodeList,
+  options?: ServerOptions,
+): Readable {
+  if (__DEV__) {
+    console.error(
+      'renderToNodeStream is deprecated. Use renderToPipeableStream instead.',
+    );
+  }
+  return renderToNodeStreamImpl(children, options, false);
+}
+
+function renderToStaticNodeStream(
+  children: ReactNodeList,
+  options?: ServerOptions,
+): Readable {
+  return renderToNodeStreamImpl(children, options, true);
+}
+
+export {renderToNodeStream, renderToStaticNodeStream};
diff --git a/scripts/shared/inlinedHostConfigs.js b/scripts/shared/inlinedHostConfigs.js
index 3092f25391d0..34d1672193d4 100644
--- a/scripts/shared/inlinedHostConfigs.js
+++ b/scripts/shared/inlinedHostConfigs.js
@@ -72,6 +72,7 @@ module.exports = [
       'react-dom/src/server/ReactDOMLegacyServerImpl.js', // not an entrypoint, but only usable in *Brower and *Node files
       'react-dom/src/server/ReactDOMLegacyServerBrowser.js', // react-dom/server.browser
       'react-dom/src/server/ReactDOMLegacyServerNode.js', // react-dom/server.node
+      'react-dom/src/server/ReactDOMLegacyServerNodeStream.js', // file indirection to support partial forking of some methods in *Node
       'react-client/src/ReactFlightClientStream.js', // We can only type check this in streaming configurations.
     ],
     isFlowTyped: true,