diff --git a/src/core/util/props.js b/src/core/util/props.js
index 5a90f21b5f0..facea1fa5ba 100644
--- a/src/core/util/props.js
+++ b/src/core/util/props.js
@@ -8,6 +8,7 @@ import {
   toRawType,
   hyphenate,
   capitalize,
+  isDate,
   isPlainObject
 } from 'shared/util'
 
@@ -166,6 +167,8 @@ function assertType (value: any, type: Function, vm: ?Component): {
     valid = isPlainObject(value)
   } else if (expectedType === 'Array') {
     valid = Array.isArray(value)
+  } else if (expectedType === 'Date') {
+    valid = isDate(value)
   } else {
     try {
       valid = value instanceof type
diff --git a/src/shared/util.js b/src/shared/util.js
index 9f240c77b14..06200ef2184 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -63,6 +63,10 @@ export function isRegExp (v: any): boolean {
   return _toString.call(v) === '[object RegExp]'
 }
 
+export function isDate (v: any): boolean {
+  return v instanceof Date || _toString.call(v) === '[object Date]'
+}
+
 /**
  * Check if val is a valid array index.
  */
@@ -294,7 +298,7 @@ export function looseEqual (a: any, b: any): boolean {
         return a.length === b.length && a.every((e, i) => {
           return looseEqual(e, b[i])
         })
-      } else if (a instanceof Date && b instanceof Date) {
+      } else if (isDate(a) && isDate(b)) {
         return a.getTime() === b.getTime()
       } else if (!isArrayA && !isArrayB) {
         const keysA = Object.keys(a)
diff --git a/test/ssr/ssr-string.spec.js b/test/ssr/ssr-string.spec.js
index 33094be9c33..4a537d997d6 100644
--- a/test/ssr/ssr-string.spec.js
+++ b/test/ssr/ssr-string.spec.js
@@ -1666,6 +1666,20 @@ describe('SSR: renderToString', () => {
       done()
     })
   })
+
+  it('should not warn for Date prop when it comes from another context', done => {
+    const date = VM.runInNewContext('new Date()')
+    new Vue({
+      props: {
+        date: Date,
+      },
+      propsData: {
+        date
+      }
+    })
+    expect('Invalid prop: type check failed for prop "date". Expected Date, got Date').not.toHaveBeenWarned()
+    done()
+  })
 })
 
 function renderVmWithOptions (options, cb) {