diff --git a/cloud/docker/docker.py b/cloud/docker/docker.py
index 1cf85843e0e..e045e2ce1fc 100644
--- a/cloud/docker/docker.py
+++ b/cloud/docker/docker.py
@@ -1428,7 +1428,7 @@ class DockerManager(object):
         if api_version < 1.19:
             params['mem_limit'] = mem_limit
         else:
-            params['host_config']['mem_limit'] = mem_limit
+            params['host_config']['Memory'] = mem_limit
 
 
         def do_create(count, params):