diff --git a/docker/client.py b/docker/client.py
index 56a60a97..085dff41 100644
--- a/docker/client.py
+++ b/docker/client.py
@@ -526,7 +526,7 @@ class Client(requests.Session):
             'exec_start instead', DeprecationWarning
         )
         create_res = self.exec_create(
-            container, cmd, detach, stdout, stderr, tty
+            container, cmd, stdout, stderr, tty
         )
 
         return self.exec_start(create_res, detach, tty, stream)