diff --git a/odoo/addons/base/ir/ir_qweb/assetsbundle.py b/odoo/addons/base/ir/ir_qweb/assetsbundle.py
index a6fac8101e4..f2221e9f7cd 100644
--- a/odoo/addons/base/ir/ir_qweb/assetsbundle.py
+++ b/odoo/addons/base/ir/ir_qweb/assetsbundle.py
@@ -112,8 +112,11 @@ class AssetsBundle(object):
                     if self.css_errors:
                         msg = '\n'.join(self.css_errors)
                         response.append(JavascriptAsset(self, inline=self.dialog_message(msg)).to_html())
-                for style in self.stylesheets:
-                    response.append(style.to_html())
+                        response.append(StylesheetAsset(self, url="/web/static/lib/bootstrap/css/bootstrap.css").to_html())
+                if not self.css_errors:
+                    for style in self.stylesheets:
+                        response.append(style.to_html())
+
             if js:
                 for jscript in self.javascripts:
                     response.append(jscript.to_html())