diff --git a/README.md b/README.md
index 471abd8..6ef98b4 100644
--- a/README.md
+++ b/README.md
@@ -98,6 +98,7 @@ interface TemplateCompileOptions {
 }
 
 interface TemplateCompileResult {
+  ast: Object | undefined
   code: string
   source: string
   tips: string[]
diff --git a/lib/compileTemplate.ts b/lib/compileTemplate.ts
index 638f77b..ad1cf0a 100644
--- a/lib/compileTemplate.ts
+++ b/lib/compileTemplate.ts
@@ -28,6 +28,7 @@ export interface TemplateCompileOptions {
 }
 
 export interface TemplateCompileResult {
+  ast: Object | undefined
   code: string
   source: string
   tips: (string | ErrorWithRange)[]
@@ -47,6 +48,7 @@ export function compileTemplate(
     )
   } else if (preprocessLang) {
     return {
+      ast: {},
       code: `var render = function () {}\n` + `var staticRenderFns = []\n`,
       source: options.source,
       tips: [
@@ -124,13 +126,14 @@ function actuallyCompile(
     })
   }
 
-  const { render, staticRenderFns, tips, errors } = compile(
+  const { ast, render, staticRenderFns, tips, errors } = compile(
     source,
     finalCompilerOptions
   )
 
   if (errors && errors.length) {
     return {
+      ast,
       code: `var render = function () {}\n` + `var staticRenderFns = []\n`,
       source,
       tips,
@@ -181,6 +184,7 @@ function actuallyCompile(
     }
 
     return {
+      ast,
       code,
       source,
       tips,
diff --git a/lib/types.ts b/lib/types.ts
index f2542bb..c534544 100644
--- a/lib/types.ts
+++ b/lib/types.ts
@@ -33,6 +33,8 @@ export interface VueTemplateCompiler {
 export interface VueTemplateCompilerOptions {
   modules?: Object[]
   outputSourceRange?: boolean
+  whitespace?: 'preserve' | 'condense'
+  directives?: { [key: string]: Function }
 }
 
 export interface VueTemplateCompilerParseOptions {
@@ -46,7 +48,7 @@ export interface ErrorWithRange {
 }
 
 export interface VueTemplateCompilerResults {
-  ast: Object | void
+  ast: Object | undefined
   render: string
   staticRenderFns: string[]
   errors: (string | ErrorWithRange)[]
diff --git a/test/compileTemplate.spec.ts b/test/compileTemplate.spec.ts
index de29064..762a3ff 100644
--- a/test/compileTemplate.spec.ts
+++ b/test/compileTemplate.spec.ts
@@ -34,6 +34,7 @@ test('should work', () => {
   expect(result.code).toMatch(`render._withStripped = true`)
   // should prefix bindings
   expect(result.code).toMatch(`_vm.render`)
+  expect(result.ast).not.toBeUndefined()
 })
 
 test('preprocess pug', () => {