diff --git a/views/js/controller/creator/encoders/dom2qti.js b/views/js/controller/creator/encoders/dom2qti.js
index bc2de9c50..6db580bad 100644
--- a/views/js/controller/creator/encoders/dom2qti.js
+++ b/views/js/controller/creator/encoders/dom2qti.js
@@ -156,13 +156,13 @@ define([
                     nodeName = normalizeNodeName(elt.nodeName);
 
                     object = _.merge(qtiElementHelper.create(nodeName, {
-                        'id': '',
-                        'class': '',
-                        'xmlBase': '',
-                        'lang': '',
-                        'label': ''
-                    }), {
-                        ...(_.transform(elt.attributes, function (acc, value) {
+                            'id': '',
+                            'class': '',
+                            'xmlBase': '',
+                            'lang': '',
+                            'label': ''
+                        }),
+                        _.transform(elt.attributes, function (acc, value) {
                             const attrName = normalizeNodeName(value.nodeName);
                             if (attrName) {
                                 if (typedAttributes[nodeName] && typedAttributes[nodeName][attrName]) {
@@ -171,8 +171,9 @@ define([
                                     acc[attrName] = value.nodeValue;
                                 }
                             }
-                        }))
-                    });
+                            return acc;
+                        }, {})
+                    );
                     if (elt.childNodes.length > 0) {
                         object.content = self.decode(elt.childNodes);
                     }