diff --git a/lib/loader.js b/lib/loader.js
index 45edc130e..36c58ce68 100644
--- a/lib/loader.js
+++ b/lib/loader.js
@@ -85,7 +85,7 @@ module.exports = function (content) {
     this.options.context ||
     process.cwd()
   const sourceRoot = path.dirname(path.relative(context, filePath))
-  const shortFilePath = path.relative(context, filePath).replace(/^(\.\.[\\\/])+/, '')
+  const shortFilePath = path.relative(context, filePath).replace(/^(\.\.[\\\/])+/, '').replace(/\\/g, '/')
   const moduleId = 'data-v-' + hash(isProduction ? (shortFilePath + '\n' + content) : shortFilePath)
 
   let cssLoaderOptions = ''
diff --git a/lib/parser.js b/lib/parser.js
index 5eec24ae4..a02cca317 100644
--- a/lib/parser.js
+++ b/lib/parser.js
@@ -7,7 +7,7 @@ const splitRE = /\r?\n/g
 const emptyRE = /^(?:\/\/)?\s*$/
 
 module.exports = (content, filename, needMap, sourceRoot, needCSSMap) => {
-  const cacheKey = hash(filename + content)
+  const cacheKey = hash((filename + content).replace(/\\/g, '/'))
   let output = cache.get(cacheKey)
   if (output) return output
   output = compiler.parseComponent(content, { pad: 'line' })
diff --git a/test/test.js b/test/test.js
index e87d7bc82..44addd5d3 100644
--- a/test/test.js
+++ b/test/test.js
@@ -36,7 +36,7 @@ const globalConfig = {
 }
 
 function genId (file) {
-  return hash(path.join('test', 'fixtures', file))
+  return hash(path.join('test', 'fixtures', file).replace(/\\/g, '/'))
 }
 
 function bundle (options, cb, wontThrowError) {
@@ -129,7 +129,7 @@ describe('vue-loader', () => {
     test({
       entry: './test/fixtures/basic.vue'
     }, (window, module, rawModule) => {
-      expect(module.__file).to.equal(path.normalize('test/fixtures/basic.vue'))
+      expect(module.__file).to.equal(path.normalize('test/fixtures/basic.vue').replace(/\\/g, '/'))
       done()
     })
   })