diff --git a/addons/web/static/src/js/views/basic/basic_renderer.js b/addons/web/static/src/js/views/basic/basic_renderer.js
index a18a82e5745..dd0f59a4176 100644
--- a/addons/web/static/src/js/views/basic/basic_renderer.js
+++ b/addons/web/static/src/js/views/basic/basic_renderer.js
@@ -176,23 +176,17 @@ var BasicRenderer = AbstractRenderer.extend({
      * @param {Object} modifiersData
      * @param {Object} record
      * @param {Object} [element] - do the update only on this element if given
-     * @returns {Deferred} resolved once finished
      */
     _applyModifiers: function (modifiersData, record, element) {
         var self = this;
-        var defs = [];
         var modifiers = modifiersData.evaluatedModifiers[record.id] || {};
 
-        this.defs = defs; // Potentially filled by widget rerendering
         if (element) {
             _apply(element);
         } else {
             // Clone is necessary as the list might change during _.each
             _.each(_.clone(modifiersData.elementsByRecord[record.id]), _apply);
         }
-        delete this.defs;
-
-        return $.when.apply($, defs);
 
         function _apply(element) {
             // If the view is in edit mode and that a widget have to switch
@@ -540,10 +534,13 @@ var BasicRenderer = AbstractRenderer.extend({
     _updateAllModifiers: function (record) {
         var self = this;
 
-        var defs = _.flatten(_.map(this.allModifiersData, function (modifiersData) {
+        var defs = [];
+        this.defs = defs; // Potentially filled by widget rerendering
+        _.each(this.allModifiersData, function (modifiersData) {
             self._computeModifiers(modifiersData, record);
-            return self._applyModifiers(modifiersData, record);
-        }));
+            self._applyModifiers(modifiersData, record);
+        });
+        delete this.defs;
 
         return $.when.apply($, defs);
     },
diff --git a/addons/web/static/tests/views/form_tests.js b/addons/web/static/tests/views/form_tests.js
index ce2f3b37f29..804ac737ef7 100644
--- a/addons/web/static/tests/views/form_tests.js
+++ b/addons/web/static/tests/views/form_tests.js
@@ -3112,5 +3112,27 @@ QUnit.module('Views', {
             "the stat button should contain a span with the string attribute value");
         form.destroy();
     });
+
+    QUnit.test('renderer waits for asynchronous fields rendering', function (assert) {
+        assert.expect(1);
+        var done = assert.async();
+
+        testUtils.createAsyncView({
+            View: FormView,
+            model: 'partner',
+            data: this.data,
+            arch: '<form string="Partners">' +
+                    '<field name="bar"/>' +
+                    '<field name="foo" widget="ace"/>' +
+                    '<field name="int_field"/>' +
+                '</form>',
+            res_id: 1,
+        }).then(function (form) {
+            assert.strictEqual(form.$('.ace_editor').length, 1,
+                "should have waited for ace to load its dependencies");
+            form.destroy();
+            done();
+        });
+    });
 });
 });