diff --git a/addons/web/static/src/js/core/mixins.js b/addons/web/static/src/js/core/mixins.js
index 228ac2d68dd..06f39e0fcfe 100644
--- a/addons/web/static/src/js/core/mixins.js
+++ b/addons/web/static/src/js/core/mixins.js
@@ -98,8 +98,8 @@ var ParentedMixin = {
      * resource it could have reserved.
      */
     destroy : function () {
-        _.each(this.getChildren(), function (el) {
-            el.destroy();
+        this.getChildren().forEach(function (child) {
+            child.destroy();
         });
         this.setParent(undefined);
         this.__parentedDestroyed = true;
diff --git a/addons/web/static/src/js/core/widget.js b/addons/web/static/src/js/core/widget.js
index 0de8c6aa1cd..441899e30db 100644
--- a/addons/web/static/src/js/core/widget.js
+++ b/addons/web/static/src/js/core/widget.js
@@ -172,13 +172,10 @@ var Widget = core.Class.extend(mixins.PropertiesMixin, ServicesMixin, {
      * destroying itself.
      */
     destroy: function () {
-        this.getChildren().forEach(function (child) {
-            child.destroy();
-        });
+        mixins.PropertiesMixin.destroy.call(this);
         if (this.$el) {
             this.$el.remove();
         }
-        mixins.PropertiesMixin.destroy.call(this);
     },
 
     //--------------------------------------------------------------------------
diff --git a/addons/web/static/tests/core/widget_tests.js b/addons/web/static/tests/core/widget_tests.js
index 440cc97b524..13515e08641 100644
--- a/addons/web/static/tests/core/widget_tests.js
+++ b/addons/web/static/tests/core/widget_tests.js
@@ -468,6 +468,20 @@ QUnit.module('core', {}, function () {
         slowWillStartPromise.resolve();
     });
 
+    QUnit.test("don't destroy twice widget's children", function (assert) {
+        assert.expect(2);
+
+        var parent = new Widget();
+        var child = new (Widget.extend({
+            destroy: function () {
+                assert.step('destroy');
+            }
+        }))(parent);
+
+        parent.destroy();
+        assert.verifySteps(['destroy'], "child should have been detroyed only once");
+    });
+
 });
 
 });