diff --git a/modules/@angular/compiler-cli/integrationtest/test/i18n_spec.ts b/modules/@angular/compiler-cli/integrationtest/test/i18n_spec.ts
index 2f4af37884..019b354ce9 100644
--- a/modules/@angular/compiler-cli/integrationtest/test/i18n_spec.ts
+++ b/modules/@angular/compiler-cli/integrationtest/test/i18n_spec.ts
@@ -68,7 +68,7 @@ describe('template i18n extraction output', () => {
   const genDir = 'out';
 
   it('should extract i18n messages as xmb', () => {
-    const xmbOutput = path.join(outDir, 'messages.xmb');
+    const xmbOutput = path.join(outDir, 'custom_file.xmb');
     expect(fs.existsSync(xmbOutput)).toBeTruthy();
     const xmb = fs.readFileSync(xmbOutput, {encoding: 'utf-8'});
     expect(xmb).toEqual(EXPECTED_XMB);
diff --git a/modules/@angular/compiler-cli/integrationtest/test/test_ngtools_api.ts b/modules/@angular/compiler-cli/integrationtest/test/test_ngtools_api.ts
index d1ad408474..5b81e6c075 100644
--- a/modules/@angular/compiler-cli/integrationtest/test/test_ngtools_api.ts
+++ b/modules/@angular/compiler-cli/integrationtest/test/test_ngtools_api.ts
@@ -132,6 +132,7 @@ function i18nTest() {
         angularCompilerOptions: config.ngOptions,
         i18nFormat: 'xlf',
         locale: null,
+        outFile: null,
         readResource: (fileName: string) => {
           readResources.push(fileName);
           return hostContext.readResource(fileName);
diff --git a/modules/@angular/compiler-cli/src/extract_i18n.ts b/modules/@angular/compiler-cli/src/extract_i18n.ts
index 9582941104..9f52a123b4 100644
--- a/modules/@angular/compiler-cli/src/extract_i18n.ts
+++ b/modules/@angular/compiler-cli/src/extract_i18n.ts
@@ -23,7 +23,7 @@ function extract(
     ngOptions: tsc.AngularCompilerOptions, cliOptions: tsc.I18nExtractionCliOptions,
     program: ts.Program, host: ts.CompilerHost): Promise<void> {
   return Extractor.create(ngOptions, program, host, cliOptions.locale)
-      .extract(cliOptions.i18nFormat);
+      .extract(cliOptions.i18nFormat, cliOptions.outFile);
 }
 
 // Entry point
diff --git a/modules/@angular/compiler-cli/src/extractor.ts b/modules/@angular/compiler-cli/src/extractor.ts
index 25db7f1132..1ff09b6416 100644
--- a/modules/@angular/compiler-cli/src/extractor.ts
+++ b/modules/@angular/compiler-cli/src/extractor.ts
@@ -27,7 +27,7 @@ export class Extractor {
       public host: ts.CompilerHost, private ngCompilerHost: CompilerHost,
       private program: ts.Program) {}
 
-  extract(formatName: string): Promise<void> {
+  extract(formatName: string, outFile: string|null): Promise<void> {
     // Checks the format and returns the extension
     const ext = this.getExtension(formatName);
 
@@ -35,7 +35,8 @@ export class Extractor {
 
     return promiseBundle.then(bundle => {
       const content = this.serialize(bundle, ext);
-      const dstPath = path.join(this.options.genDir, `messages.${ext}`);
+      const dstFile = outFile || `messages.${ext}`;
+      const dstPath = path.join(this.options.genDir, dstFile);
       this.host.writeFile(dstPath, content, false);
     });
   }
diff --git a/modules/@angular/compiler-cli/src/ngtools_api.ts b/modules/@angular/compiler-cli/src/ngtools_api.ts
index f86463a168..4a698f7c0d 100644
--- a/modules/@angular/compiler-cli/src/ngtools_api.ts
+++ b/modules/@angular/compiler-cli/src/ngtools_api.ts
@@ -62,6 +62,7 @@ export interface NgTools_InternalApi_NG2_ExtractI18n_Options {
   readResource: (fileName: string) => Promise<string>;
   // Every new property under this line should be optional.
   locale?: string;
+  outFile?: string;
 }
 
 /**
@@ -147,6 +148,6 @@ export class NgTools_InternalApi_NG_2 {
     const extractor = Extractor.create(
         options.angularCompilerOptions, options.program, options.host, locale, hostContext);
 
-    return extractor.extract(options.i18nFormat);
+    return extractor.extract(options.i18nFormat, options.outFile || null);
   }
 }
diff --git a/scripts/ci-lite/offline_compiler_test.sh b/scripts/ci-lite/offline_compiler_test.sh
index 107d308e16..cd0ada6e8d 100755
--- a/scripts/ci-lite/offline_compiler_test.sh
+++ b/scripts/ci-lite/offline_compiler_test.sh
@@ -49,7 +49,7 @@ cp -v package.json $TMP
   ./node_modules/.bin/ngc -p tsconfig-build.json --i18nFile=src/messages.fi.xlf --locale=fi --i18nFormat=xlf
 
   ./node_modules/.bin/ng-xi18n -p tsconfig-xi18n.json --i18nFormat=xlf --locale=fr
-  ./node_modules/.bin/ng-xi18n -p tsconfig-xi18n.json --i18nFormat=xmb
+  ./node_modules/.bin/ng-xi18n -p tsconfig-xi18n.json --i18nFormat=xmb --outFile=custom_file.xmb
 
   node test/test_summaries.js
   node test/test_ngtools_api.js
diff --git a/tools/@angular/tsc-wrapped/src/cli_options.ts b/tools/@angular/tsc-wrapped/src/cli_options.ts
index acd1db988b..c379ee5c94 100644
--- a/tools/@angular/tsc-wrapped/src/cli_options.ts
+++ b/tools/@angular/tsc-wrapped/src/cli_options.ts
@@ -11,13 +11,19 @@ export class CliOptions {
 }
 
 export class I18nExtractionCliOptions extends CliOptions {
-  public i18nFormat: string;
-  public locale: string;
+  i18nFormat: string|null;
+  locale: string|null;
+  outFile: string|null;
 
-  constructor({i18nFormat = null, locale = null}: {i18nFormat?: string, locale: string|null}) {
+  constructor({i18nFormat = null, locale = null, outFile = null}: {
+    i18nFormat?: string,
+    locale?: string,
+    outFile?: string,
+  }) {
     super({});
     this.i18nFormat = i18nFormat;
     this.locale = locale;
+    this.outFile = outFile;
   }
 }