diff --git a/src/core/watcher-helper.ts b/src/core/watcher-helper.ts
index 4c543754d..2e1a441f3 100644
--- a/src/core/watcher-helper.ts
+++ b/src/core/watcher-helper.ts
@@ -39,7 +39,10 @@ export class WatcherHelper {
     }
 
     private _isDifferentValues(oldValue: any, newValue: any, deepCheck: boolean) {
-        if (deepCheck && newValue instanceof (Object) && oldValue instanceof (Object)) {
+        let isObjectValues = newValue instanceof Object && oldValue instanceof Object,
+            isDateValues = oldValue instanceof Date && newValue instanceof Date;
+
+        if (deepCheck && isObjectValues && !isDateValues) {
             return this._checkObjectsFields(newValue, oldValue);
         }
         return oldValue !== newValue;
diff --git a/tests/src/ui/form.spec.ts b/tests/src/ui/form.spec.ts
index cf6040389..21558fe91 100644
--- a/tests/src/ui/form.spec.ts
+++ b/tests/src/ui/form.spec.ts
@@ -25,7 +25,8 @@ import {
 })
 class TestContainerComponent {
     formData = {
-        name: 'Unknown'
+        name: 'Unknown',
+        date: new Date()
     };
     @ViewChildren(DxFormComponent) innerWidgets: QueryList<DxFormComponent>;
 }
@@ -114,4 +115,25 @@ describe('DxForm', () => {
 
         expect(formInstance.option('formData.name')).toEqual([2]);
     }));
+
+    it('should change the value of dxDateBox', async(() => {
+        TestBed.overrideComponent(TestContainerComponent, {
+            set: {
+                template: `
+                    <dx-form [formData]="formData">
+                    </dx-form>
+                `
+            }
+        });
+        let fixture = TestBed.createComponent(TestContainerComponent);
+        fixture.detectChanges();
+
+        fixture.componentInstance.formData.date = new Date(2017, 0, 1);
+        fixture.detectChanges();
+
+        let formInstance = getWidget(fixture);
+        let dateBoxInstance = formInstance.getEditor('date');
+
+        expect(dateBoxInstance.option('value')).toEqual(new Date(2017, 0, 1));
+    }));
 });