diff --git a/modules/@angular/platform-browser-dynamic/index.ts b/modules/@angular/platform-browser-dynamic/index.ts
index c3b50ef37c..b6b2211d20 100644
--- a/modules/@angular/platform-browser-dynamic/index.ts
+++ b/modules/@angular/platform-browser-dynamic/index.ts
@@ -110,6 +110,9 @@ export function bootstrap(
 }
 
 
+/**
+ * @experimental
+ */
 export function bootstrapWorkerUi(
     workerScriptUri: string,
     customProviders?: Array<any /*Type | Provider | any[]*/>): Promise<ApplicationRef> {
@@ -127,6 +130,9 @@ export function bootstrapWorkerUi(
 }
 
 
+/**
+ * @experimental
+ */
 const WORKER_APP_COMPILER_PROVIDERS: Array<any /*Type | Provider | any[]*/> = [
   COMPILER_PROVIDERS, {
     provide: CompilerConfig,
@@ -141,6 +147,9 @@ const WORKER_APP_COMPILER_PROVIDERS: Array<any /*Type | Provider | any[]*/> = [
 ];
 
 
+/**
+ * @experimental
+ */
 export function bootstrapWorkerApp(
     appComponentType: Type,
     customProviders?: Array<any /*Type | Provider | any[]*/>): Promise<ComponentRef<any>> {
diff --git a/modules/@angular/platform-browser/src/worker_render.ts b/modules/@angular/platform-browser/src/worker_render.ts
index 575fcf82bb..40d3ed812f 100644
--- a/modules/@angular/platform-browser/src/worker_render.ts
+++ b/modules/@angular/platform-browser/src/worker_render.ts
@@ -59,7 +59,7 @@ export const WORKER_UI_STARTABLE_MESSAGING_SERVICE =
     new OpaqueToken('WorkerRenderStartableMsgService');
 
 /**
- * * @experimental
+ * @experimental
  */
 export const WORKER_UI_PLATFORM_PROVIDERS: Array<any /*Type | Provider | any[]*/> = [
   PLATFORM_COMMON_PROVIDERS, {provide: WORKER_RENDER_PLATFORM_MARKER, useValue: true},
@@ -67,7 +67,7 @@ export const WORKER_UI_PLATFORM_PROVIDERS: Array<any /*Type | Provider | any[]*/
 ];
 
 /**
- * * @experimental
+ * @experimental
  */
 export const WORKER_UI_APPLICATION_PROVIDERS: Array<any /*Type | Provider | any[]*/> = [
   APPLICATION_COMMON_PROVIDERS,
@@ -120,7 +120,7 @@ function initWebWorkerRenderPlatform(): void {
 }
 
 /**
- * * @experimental
+ * @experimental
  */
 export function workerUiPlatform(): PlatformRef {
   if (isBlank(getPlatform())) {