diff --git a/vue/vue-tests.ts b/vue/vue-tests.ts
index 540f9f5ba..297379bbb 100644
--- a/vue/vue-tests.ts
+++ b/vue/vue-tests.ts
@@ -17,7 +17,7 @@ module myapp {
       });
       this.methods = {
         action: this.action
-      }
+      };
     }
     action(): void {
       console.log("action");
@@ -27,3 +27,7 @@ module myapp {
 
 var app = new myapp.Application();
 app.$mount("#main");
+
+var AppConstructor = Vue.extend({});
+var extendedApp = new AppConstructor();
+app.$mount("#main");
diff --git a/vue/vue.d.ts b/vue/vue.d.ts
index 25fcc4277..109f81762 100644
--- a/vue/vue.d.ts
+++ b/vue/vue.d.ts
@@ -120,7 +120,7 @@ declare module vuejs {
      * http://vuejs.org/api/global-api.html
      */
     static config: VueConfig;
-    static extend(options: {}): Vue;
+    static extend(options: {}): typeof Vue;
     static directive(id: string, definition?: {}): void;
     static directive(id: string, definition?: VueCallback): void;
     static filter(id: string, definition?: FilterCallback): void;
@@ -168,4 +168,4 @@ import Vue = vuejs.Vue;
 declare module "vue" {
     import vue = vuejs.Vue;
     export = vue;
-}
\ No newline at end of file
+}