diff --git a/djsixpack/djsixpack.py b/djsixpack/djsixpack.py
index b0ee477..05c5a2d 100644
--- a/djsixpack/djsixpack.py
+++ b/djsixpack/djsixpack.py
@@ -92,7 +92,7 @@ def participate(self, force=None, user_agent=None, ip_address=None, prefetch=Fal
             prefetch = True
 
         try:
-            resp = session.participate(experiment_name, self.alternatives, force=force, prefetch=prefetch)
+            resp = session.participate(experiment_name, self.alternatives, force=force, prefetch=prefetch, bucket=bucket)
         except RequestException:
             logger.exception("Error while trying to .participate")
             if force in self.alternatives: