diff --git a/odoo/addons/base/models/ir_http.py b/odoo/addons/base/models/ir_http.py
index d6152f2e6d5..7b3b9b335bc 100644
--- a/odoo/addons/base/models/ir_http.py
+++ b/odoo/addons/base/models/ir_http.py
@@ -191,7 +191,8 @@ class IrHttp(models.AbstractModel):
 
         # This is done first as the attachment path may
         # not match any HTTP controller
-        if isinstance(exception, werkzeug.exceptions.HTTPException) and exception.code == 404:
+        if (isinstance(exception, werkzeug.exceptions.HTTPException) and exception.code == 404) or \
+           (isinstance(exception, odoo.exceptions.AccessError)):
             serve = cls._serve_fallback(exception)
             if serve:
                 return serve