diff --git a/docker/types/containers.py b/docker/types/containers.py
index ad162555..06d0ee43 100644
--- a/docker/types/containers.py
+++ b/docker/types/containers.py
@@ -327,7 +327,7 @@ class HostConfig(dict):
             if version_lt(version, '1.18'):
                 raise host_config_version_error('cpuset_cpus', '1.18')
 
-            self['CpuSetCpus'] = cpuset_cpus
+            self['CpusetCpus'] = cpuset_cpus
 
         if cpuset_mems:
             if version_lt(version, '1.19'):
diff --git a/tests/unit/api_container_test.py b/tests/unit/api_container_test.py
index 39df2939..662d3f59 100644
--- a/tests/unit/api_container_test.py
+++ b/tests/unit/api_container_test.py
@@ -332,7 +332,7 @@ class CreateContainerTest(BaseAPIClientTest):
                              "StdinOnce": false,
                              "NetworkDisabled": false,
                              "HostConfig": {
-                                "CpuSetCpus": "0,1",
+                                "CpusetCpus": "0,1",
                                 "NetworkMode": "default"
                              }}'''))
         self.assertEqual(args[1]['headers'],
diff --git a/tests/unit/models_containers_test.py b/tests/unit/models_containers_test.py
index c5946061..4f4dc0f3 100644
--- a/tests/unit/models_containers_test.py
+++ b/tests/unit/models_containers_test.py
@@ -135,7 +135,7 @@ class ContainerCollectionTest(unittest.TestCase):
                 'CpuPeriod': 1,
                 'CpuQuota': 2,
                 'CpuShares': 5,
-                'CpuSetCpus': '0-3',
+                'CpusetCpus': '0-3',
                 'Devices': [{'PathOnHost': '/dev/sda',
                              'CgroupPermissions': 'rwm',
                              'PathInContainer': '/dev/xvda'}],