diff --git a/addons/website/models/ir_qweb.py b/addons/website/models/ir_qweb.py
index 50e09e678bd..836d55b3304 100644
--- a/addons/website/models/ir_qweb.py
+++ b/addons/website/models/ir_qweb.py
@@ -112,8 +112,11 @@ class IrQWeb(models.AbstractModel):
             return atts
 
         name = self.URL_ATTRS.get(tagName)
-        if request and name and name in atts:
-            atts[name] = url_for(atts[name])
+        if request:
+            if name and name in atts:
+                atts[name] = url_for(atts[name])
+            # Adapt background-image URL in the same way as image src.
+            atts = self._adapt_style_background_image(atts, url_for)
 
         if not website.cdn_activated:
             return atts
@@ -125,8 +128,11 @@ class IrQWeb(models.AbstractModel):
                 atts[name] = website.get_cdn_url(atts[name])
             if data_name in atts:
                 atts[data_name] = website.get_cdn_url(atts[data_name])
-        if isinstance(atts.get('style'), str) and 'background-image' in atts['style']:
-            atts = OrderedDict(atts)
-            atts['style'] = re_background_image.sub(lambda m: '%s%s' % (m.group(1), website.get_cdn_url(m.group(2))), atts['style'])
+        atts = self._adapt_style_background_image(atts, website.get_cdn_url)
 
         return atts
+
+    def _adapt_style_background_image(self, atts, url_adapter):
+        if isinstance(atts.get('style'), str) and 'background-image' in atts['style']:
+            atts['style'] = re_background_image.sub(lambda m: '%s%s' % (m[1], url_adapter(m[2])), atts['style'])
+        return atts