diff --git a/openerp/addons/base/ir/ir_http.py b/openerp/addons/base/ir/ir_http.py
index 5320a0c0b95..c8bf0776d01 100644
--- a/openerp/addons/base/ir/ir_http.py
+++ b/openerp/addons/base/ir/ir_http.py
@@ -109,11 +109,9 @@ class ir_http(osv.AbstractModel):
             datas = attach[0]['datas'] or ''
             name = attach[0]['name']
 
-            if not datas:
-                if name.startswith(('http://', 'https://', '/')):
-                    return werkzeug.utils.redirect(name, 301)
-                else:
-                    return werkzeug.wrappers.Response(status=204)     # NO CONTENT
+            if (not datas and name != request.httprequest.path and
+                    name.startswith(('http://', 'https://', '/'))):
+                return werkzeug.utils.redirect(name, 301)
 
             response = werkzeug.wrappers.Response()
             server_format = openerp.tools.misc.DEFAULT_SERVER_DATETIME_FORMAT