diff --git a/addons/website/controllers/main.py b/addons/website/controllers/main.py
index 99492aaffee..c00e8e4624c 100644
--- a/addons/website/controllers/main.py
+++ b/addons/website/controllers/main.py
@@ -162,7 +162,7 @@ class Website(Home):
             create_date = fields.Datetime.from_string(sitemap.create_date)
             delta = datetime.datetime.now() - create_date
             if delta < SITEMAP_CACHE_TIME:
-                content = base64.b64decode(sitemap)
+                content = base64.b64decode(sitemap.datas)
 
         if not content:
             # Remove all sitemaps in ir.attachments as we're going to regenerated them