diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 253daff86d392..875c1c43d4c3b 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -10,7 +10,7 @@ module ts {
     /** The version of the TypeScript compiler release */
     export let version = "1.5.0.0";
 
-    export function createCompilerHost(options: CompilerOptions): CompilerHost {
+    export function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost {
         let currentDirectory: string;
         let existingDirectories: Map<boolean> = {};
 
@@ -38,7 +38,7 @@ module ts {
                 }
                 text = "";
             }
-            return text !== undefined ? createSourceFile(fileName, text, languageVersion) : undefined;
+            return text !== undefined ? createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
         }
 
         function directoryExists(directoryPath: string): boolean {
diff --git a/tests/baselines/reference/APISample_compile.js b/tests/baselines/reference/APISample_compile.js
index 575c2bdaf36d1..533e0a3512fcb 100644
--- a/tests/baselines/reference/APISample_compile.js
+++ b/tests/baselines/reference/APISample_compile.js
@@ -1472,7 +1472,7 @@ declare module "typescript" {
 declare module "typescript" {
     /** The version of the TypeScript compiler release */
     let version: string;
-    function createCompilerHost(options: CompilerOptions): CompilerHost;
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
     function getPreEmitDiagnostics(program: Program): Diagnostic[];
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
     function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost): Program;
diff --git a/tests/baselines/reference/APISample_compile.types b/tests/baselines/reference/APISample_compile.types
index 336d70aa1a196..1d5260dec2e61 100644
--- a/tests/baselines/reference/APISample_compile.types
+++ b/tests/baselines/reference/APISample_compile.types
@@ -4714,10 +4714,11 @@ declare module "typescript" {
     let version: string;

 >version : string
 
-    function createCompilerHost(options: CompilerOptions): CompilerHost;

->createCompilerHost : (options: CompilerOptions) => CompilerHost
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;

+>createCompilerHost : (options: CompilerOptions, setParentNodes?: boolean) => CompilerHost
 >options : CompilerOptions
 >CompilerOptions : CompilerOptions
+>setParentNodes : boolean
 >CompilerHost : CompilerHost
 
     function getPreEmitDiagnostics(program: Program): Diagnostic[];

diff --git a/tests/baselines/reference/APISample_linter.js b/tests/baselines/reference/APISample_linter.js
index e7145e2407059..116df90ffa62a 100644
--- a/tests/baselines/reference/APISample_linter.js
+++ b/tests/baselines/reference/APISample_linter.js
@@ -1503,7 +1503,7 @@ declare module "typescript" {
 declare module "typescript" {
     /** The version of the TypeScript compiler release */
     let version: string;
-    function createCompilerHost(options: CompilerOptions): CompilerHost;
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
     function getPreEmitDiagnostics(program: Program): Diagnostic[];
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
     function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost): Program;
diff --git a/tests/baselines/reference/APISample_linter.types b/tests/baselines/reference/APISample_linter.types
index a40848b9e4c63..e277cabf4792a 100644
--- a/tests/baselines/reference/APISample_linter.types
+++ b/tests/baselines/reference/APISample_linter.types
@@ -4860,10 +4860,11 @@ declare module "typescript" {
     let version: string;

 >version : string
 
-    function createCompilerHost(options: CompilerOptions): CompilerHost;

->createCompilerHost : (options: CompilerOptions) => CompilerHost
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;

+>createCompilerHost : (options: CompilerOptions, setParentNodes?: boolean) => CompilerHost
 >options : CompilerOptions
 >CompilerOptions : CompilerOptions
+>setParentNodes : boolean
 >CompilerHost : CompilerHost
 
     function getPreEmitDiagnostics(program: Program): Diagnostic[];

diff --git a/tests/baselines/reference/APISample_transform.js b/tests/baselines/reference/APISample_transform.js
index da8fe979d1700..0879052a239f0 100644
--- a/tests/baselines/reference/APISample_transform.js
+++ b/tests/baselines/reference/APISample_transform.js
@@ -1504,7 +1504,7 @@ declare module "typescript" {
 declare module "typescript" {
     /** The version of the TypeScript compiler release */
     let version: string;
-    function createCompilerHost(options: CompilerOptions): CompilerHost;
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
     function getPreEmitDiagnostics(program: Program): Diagnostic[];
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
     function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost): Program;
diff --git a/tests/baselines/reference/APISample_transform.types b/tests/baselines/reference/APISample_transform.types
index b694678d4cb9a..ed551e0749ae1 100644
--- a/tests/baselines/reference/APISample_transform.types
+++ b/tests/baselines/reference/APISample_transform.types
@@ -4810,10 +4810,11 @@ declare module "typescript" {
     let version: string;

 >version : string
 
-    function createCompilerHost(options: CompilerOptions): CompilerHost;

->createCompilerHost : (options: CompilerOptions) => CompilerHost
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;

+>createCompilerHost : (options: CompilerOptions, setParentNodes?: boolean) => CompilerHost
 >options : CompilerOptions
 >CompilerOptions : CompilerOptions
+>setParentNodes : boolean
 >CompilerHost : CompilerHost
 
     function getPreEmitDiagnostics(program: Program): Diagnostic[];

diff --git a/tests/baselines/reference/APISample_watcher.js b/tests/baselines/reference/APISample_watcher.js
index f380994eba888..a4d88e22b78c3 100644
--- a/tests/baselines/reference/APISample_watcher.js
+++ b/tests/baselines/reference/APISample_watcher.js
@@ -1541,7 +1541,7 @@ declare module "typescript" {
 declare module "typescript" {
     /** The version of the TypeScript compiler release */
     let version: string;
-    function createCompilerHost(options: CompilerOptions): CompilerHost;
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
     function getPreEmitDiagnostics(program: Program): Diagnostic[];
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
     function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost): Program;
diff --git a/tests/baselines/reference/APISample_watcher.types b/tests/baselines/reference/APISample_watcher.types
index 06329de5c961f..f73db5f983db1 100644
--- a/tests/baselines/reference/APISample_watcher.types
+++ b/tests/baselines/reference/APISample_watcher.types
@@ -4983,10 +4983,11 @@ declare module "typescript" {
     let version: string;

 >version : string
 
-    function createCompilerHost(options: CompilerOptions): CompilerHost;

->createCompilerHost : (options: CompilerOptions) => CompilerHost
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;

+>createCompilerHost : (options: CompilerOptions, setParentNodes?: boolean) => CompilerHost
 >options : CompilerOptions
 >CompilerOptions : CompilerOptions
+>setParentNodes : boolean
 >CompilerHost : CompilerHost
 
     function getPreEmitDiagnostics(program: Program): Diagnostic[];