diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index ccb6475e01d..5295942aa95 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -511,38 +511,47 @@ instance.web.FormView = instance.web.View.extend(instance.web.form.FieldManagerM
             }
             this.onchanges_mutex.exec(function(){
                 return def.then(function(response) {
-                    if (widget && widget.field['change_default']) {
-                        var fieldname = widget.name;
-                        var value_;
-                        if (response.value && (fieldname in response.value)) {
-                            // Use value from onchange if onchange executed
-                            value_ = response.value[fieldname];
-                        } else {
-                            // otherwise get form value for field
-                            value_ = self.fields[fieldname].get_value();
-                        }
-                        var condition = fieldname + '=' + value_;
-
-                        if (value_) {
-                            return self.alive(new instance.web.Model('ir.values').call(
-                                'get_defaults', [self.model, condition]
-                            )).then(function (results) {
-                                if (!results.length) {
-                                    return response;
-                                }
-                                if (!response.value) {
-                                    response.value = {};
-                                }
-                                for(var i=0; i<results.length; ++i) {
-                                    // [whatever, key, value]
-                                    var triplet = results[i];
-                                    response.value[triplet[1]] = triplet[2];
-                                }
-                                return response;
-                            });
-                        }
+                    var fields = {};
+                    if (widget){
+                        fields[widget.name] = widget.field;
                     }
-                    return response;
+                    else{
+                        fields = self.fields_view.fields;
+                    }
+                    var defs = [];
+                    _.each(fields, function(field, fieldname){
+                        if (field && field.change_default) {
+                            var value_;
+                            if (response.value && (fieldname in response.value)) {
+                                // Use value from onchange if onchange executed
+                                value_ = response.value[fieldname];
+                            } else {
+                                // otherwise get form value for field
+                                value_ = self.fields[fieldname].get_value();
+                            }
+                            var condition = fieldname + '=' + value_;
+
+                            if (value_) {
+                                defs.push(self.alive(new instance.web.Model('ir.values').call(
+                                    'get_defaults', [self.model, condition]
+                                )).then(function (results) {
+                                    if (!results.length) {
+                                        return response;
+                                    }
+                                    if (!response.value) {
+                                        response.value = {};
+                                    }
+                                    for(var i=0; i<results.length; ++i) {
+                                        // [whatever, key, value]
+                                        var triplet = results[i];
+                                        response.value[triplet[1]] = triplet[2];
+                                    }
+                                    return response;
+                                }));
+                            }
+                        }
+                    });
+                    return _.isEmpty(defs) ? response : $.when.apply(null, defs);
                 }).then(function(response) {
                     return self.on_processed_onchange(response);
                 });