diff --git a/addons/web/static/src/js/widgets/date_picker.js b/addons/web/static/src/js/widgets/date_picker.js
index 76281d9366a..b95a1c4f936 100644
--- a/addons/web/static/src/js/widgets/date_picker.js
+++ b/addons/web/static/src/js/widgets/date_picker.js
@@ -74,9 +74,16 @@ var DateWidget = Widget.extend({
      * set datetime value
      */
     changeDatetime: function () {
-        if(this.isValid()) {
+        if (this.isValid()) {
+            var oldValue = this.getValue();
             this._setValueFromUi();
-            this.trigger("datetime_changed");
+            var newValue = this.getValue();
+
+            if (!oldValue !== !newValue || oldValue && newValue && !oldValue.isSame(newValue)) {
+                // The condition is strangely written; this is because the
+                // values can be false/undefined
+                this.trigger("datetime_changed");
+            }
         }
     },
     /**
diff --git a/addons/web/static/tests/widgets/domain_selector_tests.js b/addons/web/static/tests/widgets/domain_selector_tests.js
index 19731156a2c..77d8eeb24da 100644
--- a/addons/web/static/tests/widgets/domain_selector_tests.js
+++ b/addons/web/static/tests/widgets/domain_selector_tests.js
@@ -151,7 +151,7 @@ QUnit.module('DomainSelector', {
     });
 
     QUnit.test("building a domain with a datetime", function (assert) {
-        assert.expect(1);
+        assert.expect(2);
 
         var $target = $("#qunit-fixture");
 
@@ -163,8 +163,16 @@ QUnit.module('DomainSelector', {
         domainSelector.appendTo($target);
 
         // Check that there is a datepicker to choose the date
-        assert.strictEqual(domainSelector.$(".o_datepicker:visible").length, 1,
+        var $datepicker = domainSelector.$(".o_datepicker:visible");
+        assert.strictEqual($datepicker.length, 1,
             "there should be a datepicker");
+
+        var val = $datepicker.find('input').focus().click().val();
+        $('.bootstrap-datetimepicker-widget :not(.today)[data-action="selectDay"]').click();
+        assert.notEqual(domainSelector.$(".o_datepicker:visible input").val(), val,
+            "datepicker value should have changed");
+
+        domainSelector.destroy();
     });
 });
 });