diff --git a/rhodecode/lib/middleware/utils/scm_app_http.py b/rhodecode/lib/middleware/utils/scm_app_http.py
--- a/rhodecode/lib/middleware/utils/scm_app_http.py
+++ b/rhodecode/lib/middleware/utils/scm_app_http.py
@@ -90,6 +90,7 @@ class VcsHttpProxy(object):
             'X-RC-Path-Info': environ['PATH_INFO'],
             # TODO: johbo: Avoid encoding and put this into payload?
             'X-RC-Repo-Config': base64.b64encode(config),
+            'X-RC-Locked-Status-Code': rhodecode.CONFIG.get('lock_ret_code')
         })
 
         data = environ['wsgi.input'].read()