diff --git a/packages/react-dom/unstable_server-external-runtime.js b/packages/react-dom/unstable_server-external-runtime.js
new file mode 100644
index 00000000000..8f74a926da7
--- /dev/null
+++ b/packages/react-dom/unstable_server-external-runtime.js
@@ -0,0 +1,10 @@
+/**
+ * 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 * from 'react-dom/src/server/ReactDOMServerExternalRuntime';