DefinitelyTyped · RyanCavanaugh · Apr 16, 2018 · Apr 14, 2018
diff --git a/types/ember/index.d.ts b/types/ember/index.d.ts
@@ -71,13 +71,13 @@ declare module 'ember' {
      *
      * Generally you would use `EmberClass.create()` instead of `new EmberClass()`.
      *
-     * The no-arg constructor is required by the typescript compiler.
+     * The single-arg constructor is required by the typescript compiler.
      * The multi-arg constructor is included for better ergonomics.
      *
      * Implementation is carefully chosen for the reasons described in
      * https://github.com/typed-ember/ember-typings/pull/29
      */
-    type EmberClassConstructor<T> = (new () => T) & (new (...args: any[]) => T);
+    type EmberClassConstructor<T> = (new (properties?: object) => T) & (new (...args: any[]) => T);
 
     type ComputedPropertyGetterFunction<T> = (this: any, key: string) => T;
 
@@ -761,6 +761,12 @@ declare module 'ember' {
         }
         const Copyable: Ember.Mixin<Copyable>;
         class CoreObject {
+            /**
+             * As of Ember 3.1, CoreObject constructor takes initial object properties as an argument.
+             * See: https://github.com/emberjs/ember.js/commit/4709935854d4c29b0d2c054614d53fa2c55309b1
+             **/
+            constructor(properties?: object);
+
             _super(...args: any[]): any;
 
             /**

diff --git a/types/ember/test/object.ts b/types/ember/test/object.ts
@@ -13,3 +13,15 @@ const LifetimeHooks = Ember.Object.extend({
         this._super();
     }
 });
+
+class MyObject30 extends Ember.Object {
+    constructor() {
+        super();
+    }
+}
+
+class MyObject31 extends Ember.Object {
+    constructor(properties: object) {
+        super(properties);
+    }
+}