diff --git a/packages/react-dom/src/client/ReactDOM.js b/packages/react-dom/src/client/ReactDOM.js
index 9983f1418c3a3..791fc098293a1 100644
--- a/packages/react-dom/src/client/ReactDOM.js
+++ b/packages/react-dom/src/client/ReactDOM.js
@@ -7,8 +7,8 @@
  * @flow
  */
 
-import type {RootType} from './ReactDOMRoot';
 import type {ReactNodeList} from 'shared/ReactTypes';
+import type {Container} from './ReactDOMHostConfig';
 
 import '../shared/checkReact';
 import './ReactDOMClientInjection';
@@ -116,13 +116,9 @@ setBatchingImplementation(
   batchedEventUpdates,
 );
 
-export type DOMContainer =
-  | (Element & {_reactRootContainer: ?RootType, ...})
-  | (Document & {_reactRootContainer: ?RootType, ...});
-
 function createPortal(
   children: ReactNodeList,
-  container: DOMContainer,
+  container: Container,
   key: ?string = null,
 ) {
   invariant(
diff --git a/packages/react-dom/src/client/ReactDOMHostConfig.js b/packages/react-dom/src/client/ReactDOMHostConfig.js
index 4baee93d58b9d..f15805cee7470 100644
--- a/packages/react-dom/src/client/ReactDOMHostConfig.js
+++ b/packages/react-dom/src/client/ReactDOMHostConfig.js
@@ -7,6 +7,8 @@
  * @flow
  */
 
+import type {RootType} from './ReactDOMRoot';
+
 import {
   precacheFiberNode,
   updateFiberProps,
@@ -45,7 +47,6 @@ import {
 } from '../shared/HTMLNodeType';
 import dangerousStyleValue from '../shared/dangerousStyleValue';
 
-import type {DOMContainer} from './ReactDOM';
 import type {
   ReactDOMEventResponder,
   ReactDOMEventResponderInstance,
@@ -99,7 +100,9 @@ export type EventTargetChildElement = {
   },
   ...
 };
-export type Container = DOMContainer;
+export type Container =
+  | (Element & {_reactRootContainer: ?RootType, ...})
+  | (Document & {_reactRootContainer: ?RootType, ...});
 export type Instance = Element;
 export type TextInstance = Text;
 export type SuspenseInstance = Comment & {_reactRetry?: () => void, ...};
@@ -419,7 +422,7 @@ export function appendChild(
 }
 
 export function appendChildToContainer(
-  container: DOMContainer,
+  container: Container,
   child: Instance | TextInstance,
 ): void {
   let parentNode;
diff --git a/packages/react-dom/src/client/ReactDOMLegacy.js b/packages/react-dom/src/client/ReactDOMLegacy.js
index 519a0be3bb551..d074ecf577ec6 100644
--- a/packages/react-dom/src/client/ReactDOMLegacy.js
+++ b/packages/react-dom/src/client/ReactDOMLegacy.js
@@ -7,7 +7,7 @@
  * @flow
  */
 
-import type {DOMContainer} from './ReactDOM';
+import type {Container} from './ReactDOMHostConfig';
 import type {RootType} from './ReactDOMRoot';
 import type {ReactNodeList} from 'shared/ReactTypes';
 
@@ -43,7 +43,7 @@ let topLevelUpdateWarnings;
 let warnedAboutHydrateAPI = false;
 
 if (__DEV__) {
-  topLevelUpdateWarnings = (container: DOMContainer) => {
+  topLevelUpdateWarnings = (container: Container) => {
     if (container._reactRootContainer && container.nodeType !== COMMENT_NODE) {
       const hostInstance = findHostInstanceWithNoPortals(
         container._reactRootContainer._internalRoot.current,
@@ -111,7 +111,7 @@ function shouldHydrateDueToLegacyHeuristic(container) {
 }
 
 function legacyCreateRootFromDOMContainer(
-  container: DOMContainer,
+  container: Container,
   forceHydrate: boolean,
 ): RootType {
   const shouldHydrate =
@@ -175,7 +175,7 @@ function warnOnInvalidCallback(callback: mixed, callerName: string): void {
 function legacyRenderSubtreeIntoContainer(
   parentComponent: ?React$Component<any, any>,
   children: ReactNodeList,
-  container: DOMContainer,
+  container: Container,
   forceHydrate: boolean,
   callback: ?Function,
 ) {
@@ -255,7 +255,7 @@ export function findDOMNode(
 
 export function hydrate(
   element: React$Node,
-  container: DOMContainer,
+  container: Container,
   callback: ?Function,
 ) {
   invariant(
@@ -286,7 +286,7 @@ export function hydrate(
 
 export function render(
   element: React$Element<any>,
-  container: DOMContainer,
+  container: Container,
   callback: ?Function,
 ) {
   invariant(
@@ -317,7 +317,7 @@ export function render(
 export function unstable_renderSubtreeIntoContainer(
   parentComponent: React$Component<any, any>,
   element: React$Element<any>,
-  containerNode: DOMContainer,
+  containerNode: Container,
   callback: ?Function,
 ) {
   invariant(
@@ -337,7 +337,7 @@ export function unstable_renderSubtreeIntoContainer(
   );
 }
 
-export function unmountComponentAtNode(container: DOMContainer) {
+export function unmountComponentAtNode(container: Container) {
   invariant(
     isValidContainer(container),
     'unmountComponentAtNode(...): Target container is not a DOM element.',
diff --git a/packages/react-dom/src/client/ReactDOMRoot.js b/packages/react-dom/src/client/ReactDOMRoot.js
index da256457e0fb7..7cbbbbd939201 100644
--- a/packages/react-dom/src/client/ReactDOMRoot.js
+++ b/packages/react-dom/src/client/ReactDOMRoot.js
@@ -7,7 +7,7 @@
  * @flow
  */
 
-import type {DOMContainer} from './ReactDOM';
+import type {Container} from './ReactDOMHostConfig';
 import type {RootTag} from 'shared/ReactRootTags';
 import type {ReactNodeList} from 'shared/ReactTypes';
 // TODO: This type is shared between the reconciler and ReactDOM, but will
@@ -49,12 +49,12 @@ import {createContainer, updateContainer} from 'react-reconciler/inline.dom';
 import invariant from 'shared/invariant';
 import {BlockingRoot, ConcurrentRoot, LegacyRoot} from 'shared/ReactRootTags';
 
-function ReactDOMRoot(container: DOMContainer, options: void | RootOptions) {
+function ReactDOMRoot(container: Container, options: void | RootOptions) {
   this._internalRoot = createRootImpl(container, ConcurrentRoot, options);
 }
 
 function ReactDOMBlockingRoot(
-  container: DOMContainer,
+  container: Container,
   tag: RootTag,
   options: void | RootOptions,
 ) {
@@ -108,7 +108,7 @@ ReactDOMRoot.prototype.unmount = ReactDOMBlockingRoot.prototype.unmount = functi
 };
 
 function createRootImpl(
-  container: DOMContainer,
+  container: Container,
   tag: RootTag,
   options: void | RootOptions,
 ) {
@@ -129,7 +129,7 @@ function createRootImpl(
 }
 
 export function createRoot(
-  container: DOMContainer,
+  container: Container,
   options?: RootOptions,
 ): RootType {
   invariant(
@@ -141,7 +141,7 @@ export function createRoot(
 }
 
 export function createBlockingRoot(
-  container: DOMContainer,
+  container: Container,
   options?: RootOptions,
 ): RootType {
   invariant(
@@ -153,7 +153,7 @@ export function createBlockingRoot(
 }
 
 export function createLegacyRoot(
-  container: DOMContainer,
+  container: Container,
   options?: RootOptions,
 ): RootType {
   return new ReactDOMBlockingRoot(container, LegacyRoot, options);
diff --git a/packages/react-dom/src/events/ReactDOMEventReplaying.js b/packages/react-dom/src/events/ReactDOMEventReplaying.js
index 48ff7a5b00190..096a87aedae4d 100644
--- a/packages/react-dom/src/events/ReactDOMEventReplaying.js
+++ b/packages/react-dom/src/events/ReactDOMEventReplaying.js
@@ -12,7 +12,6 @@ import type {Container, SuspenseInstance} from '../client/ReactDOMHostConfig';
 import type {DOMTopLevelEventType} from 'legacy-events/TopLevelEventTypes';
 import type {EventSystemFlags} from 'legacy-events/EventSystemFlags';
 import type {FiberRoot} from 'react-reconciler/src/ReactFiberRoot';
-import type {DOMContainer} from '../client/ReactDOM';
 
 import {
   enableDeprecatedFlareAPI,
@@ -238,7 +237,7 @@ function trapReplayableEventForDocument(
 }
 
 export function eagerlyTrapReplayableEvents(
-  container: DOMContainer,
+  container: Container,
   document: Document,
 ) {
   const listenerMapForDoc = getListenerMapForElement(document);