diff --git a/addons/http_routing/models/ir_http.py b/addons/http_routing/models/ir_http.py
index e1e69f94861..96a795ae17c 100644
--- a/addons/http_routing/models/ir_http.py
+++ b/addons/http_routing/models/ir_http.py
@@ -195,7 +195,7 @@ def url_for(url_from, lang_code=None, no_rewrite=False):
             and not path.startswith('/web/')
     )):
         new_url = request.env['ir.http'].url_rewrite(path)
-        new_url = new_url and qs and new_url + '?%s' % qs
+        new_url = new_url if not qs else new_url + '?%s' % qs
 
     return url_lang(new_url or url_from, lang_code=lang_code)