diff --git a/addons/website/controllers/main.py b/addons/website/controllers/main.py
index 34838401607..03a6b74877f 100644
--- a/addons/website/controllers/main.py
+++ b/addons/website/controllers/main.py
@@ -354,9 +354,9 @@ class Website(Home):
         if get_bundle:
             context = dict(request.context)
             return {
-                'web.assets_common': request.env["ir.qweb"]._get_asset('web.assets_common', options=context),
-                'web.assets_frontend': request.env["ir.qweb"]._get_asset('web.assets_frontend', options=context),
-                'website.assets_editor': request.env["ir.qweb"]._get_asset('website.assets_editor', options=context),
+                'web.assets_common': request.env['ir.qweb']._get_asset_link_urls('web.assets_common', options=context),
+                'web.assets_frontend': request.env['ir.qweb']._get_asset_link_urls('web.assets_frontend', options=context),
+                'website.assets_editor': request.env['ir.qweb']._get_asset_link_urls('website.assets_editor', options=context),
             }
 
         return True
diff --git a/addons/website/static/src/js/widgets/theme.js b/addons/website/static/src/js/widgets/theme.js
index d5a2997031d..8f6e8d8c8e9 100644
--- a/addons/website/static/src/js/widgets/theme.js
+++ b/addons/website/static/src/js/widgets/theme.js
@@ -611,11 +611,17 @@ var ThemeCustomizeDialog = Dialog.extend({
             },
         }).then(function (bundles) {
             var $allLinks = $();
-            var defs = _.map(bundles, function (bundleContent, bundleName) {
-                var linkSelector = 'link[href*="' + bundleName + '"]';
-                var $links = $(linkSelector);
+            var defs = _.map(bundles, function (bundleURLs, bundleName) {
+                var $links = $('link[href*="' + bundleName + '"]');
                 $allLinks = $allLinks.add($links);
-                var $newLinks = $(bundleContent).filter(linkSelector);
+                var $newLinks = $();
+                _.each(bundleURLs, function (url) {
+                    $newLinks = $newLinks.add($('<link/>', {
+                        type: 'text/css',
+                        rel: 'stylesheet',
+                        href: url,
+                    }));
+                });
 
                 var linksLoaded = new Promise(function (resolve, reject) {
                     var nbLoaded = 0;
diff --git a/odoo/addons/base/models/ir_qweb.py b/odoo/addons/base/models/ir_qweb.py
index fd0abde26cd..43aa67e6805 100644
--- a/odoo/addons/base/models/ir_qweb.py
+++ b/odoo/addons/base/models/ir_qweb.py
@@ -307,6 +307,10 @@ class IrQWeb(models.AbstractModel, QWeb):
         remains = [node for node in remains if (css and node[0] == 'link') or (js and node[0] != 'link')]
         return remains + asset.to_node(css=css, js=js, debug=debug, async_load=async_load, defer_load=defer_load, lazy_load=lazy_load)
 
+    def _get_asset_link_urls(self, xmlid, options):
+        asset_nodes = self._get_asset_nodes(xmlid, options, js=False)
+        return [node[1]['href'] for node in asset_nodes if node[0] == 'link']
+
     @tools.ormcache_context('xmlid', 'options.get("lang", "en_US")', keys=("website_id",))
     def _get_asset_content(self, xmlid, options):
         options = dict(options,