diff --git a/src/index.cjs.js b/src/index.cjs.js
index c64c51f09..9b39c50a1 100644
--- a/src/index.cjs.js
+++ b/src/index.cjs.js
@@ -1,11 +1,12 @@
 import { Store, createStore } from './store'
-import { useStore } from './injectKey'
+import { storeKey, useStore } from './injectKey'
 import { mapState, mapMutations, mapGetters, mapActions, createNamespacedHelpers } from './helpers'
 import { createLogger } from './plugins/logger'
 
 export default {
   version: '__VERSION__',
   Store,
+  storeKey,
   createStore,
   useStore,
   mapState,
diff --git a/src/index.js b/src/index.js
index 27e3e9bcf..f74d97dfb 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,11 +1,12 @@
 import { Store, createStore } from './store'
-import { useStore } from './injectKey'
+import { storeKey, useStore } from './injectKey'
 import { mapState, mapMutations, mapGetters, mapActions, createNamespacedHelpers } from './helpers'
 import { createLogger } from './plugins/logger'
 
 export default {
   version: '__VERSION__',
   Store,
+  storeKey,
   createStore,
   useStore,
   mapState,
@@ -18,6 +19,7 @@ export default {
 
 export {
   Store,
+  storeKey,
   createStore,
   useStore,
   mapState,
diff --git a/src/index.mjs b/src/index.mjs
index dc524536e..244dee47a 100644
--- a/src/index.mjs
+++ b/src/index.mjs
@@ -3,6 +3,7 @@ import Vuex from '../dist/vuex.cjs.js'
 const {
   version,
   Store,
+  storeKey,
   createStore,
   install,
   useStore,
@@ -18,6 +19,7 @@ export {
   Vuex as default,
   version,
   Store,
+  storeKey,
   createStore,
   install,
   useStore,
diff --git a/types/index.d.ts b/types/index.d.ts
index 5bca84755..a9a94de82 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -43,6 +43,8 @@ export declare class Store<S> {
   }): void;
 }
 
+export const storeKey: string;
+
 export function createStore<S>(options: StoreOptions<S>): Store<S>;
 
 export function useStore<S = any>(injectKey?: InjectionKey<Store<S>> | string): Store<S>;