diff --git a/src/store.js b/src/store.js
index f540586f2..121706d0b 100644
--- a/src/store.js
+++ b/src/store.js
@@ -9,6 +9,7 @@ export class Store {
   constructor (options = {}) {
     assert(Vue, `must call Vue.use(Vuex) before creating a store instance.`)
     assert(typeof Promise !== 'undefined', `vuex requires a Promise polyfill in this browser.`)
+    assert(this instanceof Store, `Store must be called with the new operator.`)
 
     const {
       plugins = [],
diff --git a/test/unit/store.spec.js b/test/unit/store.spec.js
index 416f5c56c..71bdc2921 100644
--- a/test/unit/store.spec.js
+++ b/test/unit/store.spec.js
@@ -334,6 +334,12 @@ describe('Store', () => {
     })
   })
 
+  it('asserts the call with the new operator', () => {
+    expect(() => {
+      Vuex.Store({})
+    }).toThrowError(/Store must be called with the new operator/)
+  })
+
   it('should accept state as function', () => {
     const store = new Vuex.Store({
       state: () => ({