diff --git a/cads_mars_server/client.py b/cads_mars_server/client.py
index 530e95c..a7829c3 100644
--- a/cads_mars_server/client.py
+++ b/cads_mars_server/client.py
@@ -240,7 +240,7 @@ def __init__(self, urls, retries=3, delay=10, timeout=60, log=LOG):
     def execute(self, request, environ, target):
         random.shuffle(self.urls)
         saved = setproctitle.getproctitle()
-        request_id = request.get("request_id", "unknown")
+        request_id = environ.get("request_id", "unknown")
         try:
 
             for url in self.urls: