diff --git a/modules/@angular/core/src/linker/system_js_ng_module_factory_loader.ts b/modules/@angular/core/src/linker/system_js_ng_module_factory_loader.ts
index 7674671cdd..1cc94f1588 100644
--- a/modules/@angular/core/src/linker/system_js_ng_module_factory_loader.ts
+++ b/modules/@angular/core/src/linker/system_js_ng_module_factory_loader.ts
@@ -13,8 +13,6 @@ import {Compiler} from './compiler';
 import {NgModuleFactory} from './ng_module_factory';
 import {NgModuleFactoryLoader} from './ng_module_factory_loader';
 
-declare var System: {import: (module: string) => Promise<any>;};
-
 const _SEPARATOR = '#';
 
 const FACTORY_MODULE_SUFFIX = '.ngfactory';
diff --git a/modules/@angular/core/src/linker/systemjs_component_resolver.ts b/modules/@angular/core/src/linker/systemjs_component_resolver.ts
index 3736800251..e470e5a37f 100644
--- a/modules/@angular/core/src/linker/systemjs_component_resolver.ts
+++ b/modules/@angular/core/src/linker/systemjs_component_resolver.ts
@@ -13,8 +13,6 @@ import {Type} from '../type';
 import {ComponentFactory} from './component_factory';
 import {ComponentResolver} from './component_resolver';
 
-declare var System: {import: (module: string) => Promise<any>;};
-
 const _SEPARATOR = '#';
 
 /**
diff --git a/modules/@angular/core/tsconfig-es2015.json b/modules/@angular/core/tsconfig-es2015.json
index 72c42414af..27bb922c15 100644
--- a/modules/@angular/core/tsconfig-es2015.json
+++ b/modules/@angular/core/tsconfig-es2015.json
@@ -18,6 +18,7 @@
   "files": [
     "index.ts",
     "testing.ts",
-    "../../../node_modules/zone.js/dist/zone.js.d.ts"
+    "../../../node_modules/zone.js/dist/zone.js.d.ts",
+    "../../system.d.ts"
   ]
 }
diff --git a/modules/@angular/core/tsconfig-es5.json b/modules/@angular/core/tsconfig-es5.json
index 4edc062bfa..c19294c60a 100644
--- a/modules/@angular/core/tsconfig-es5.json
+++ b/modules/@angular/core/tsconfig-es5.json
@@ -19,6 +19,7 @@
   "files": [
     "index.ts",
     "testing.ts",
-    "../../../node_modules/zone.js/dist/zone.js.d.ts"
+    "../../../node_modules/zone.js/dist/zone.js.d.ts",
+    "../../system.d.ts"
   ]
 }
diff --git a/modules/playground/src/bootstrap.ts b/modules/playground/src/bootstrap.ts
index bd99673389..0f05070039 100644
--- a/modules/playground/src/bootstrap.ts
+++ b/modules/playground/src/bootstrap.ts
@@ -6,8 +6,6 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-declare var System: any;
-
 
 (function(global: any /** TODO #9100 */) {
 
diff --git a/modules/system.d.ts b/modules/system.d.ts
new file mode 100644
index 0000000000..f94cec235e
--- /dev/null
+++ b/modules/system.d.ts
@@ -0,0 +1,4 @@
+/**
+ * Dummy typings for systemjs.
+ */
+declare var System: any;
diff --git a/modules/types.d.ts b/modules/types.d.ts
index 58dd2c2eb0..b15312fbcb 100644
--- a/modules/types.d.ts
+++ b/modules/types.d.ts
@@ -15,3 +15,4 @@
 /// <reference path="../node_modules/@types/protractor/index.d.ts" />
 /// <reference path="../node_modules/@types/selenium-webdriver/index.d.ts" />
 /// <reference path="./es6-subset.d.ts" />
+/// <reference path="./system.d.ts" />