diff --git a/docker/api/network.py b/docker/api/network.py
index 1f9ea9e4..33a2feb9 100644
--- a/docker/api/network.py
+++ b/docker/api/network.py
@@ -21,7 +21,8 @@ class NetworkApiMixin(object):
         return self._result(res, json=True)
 
     @minimum_version('1.21')
-    def create_network(self, name, driver=None, options=None, ipam=None):
+    def create_network(self, name, driver=None, options=None, ipam=None,
+                       check_duplicate=None):
         if options is not None and not isinstance(options, dict):
             raise TypeError('options must be a dictionary')
 
@@ -30,6 +31,7 @@ class NetworkApiMixin(object):
             'Driver': driver,
             'Options': options,
             'IPAM': ipam,
+            'CheckDuplicate': check_duplicate
         }
         url = self._url("/networks/create")
         res = self._post_json(url, data=data)
diff --git a/tests/integration/network_test.py b/tests/integration/network_test.py
index 053e4ae3..0a81215a 100644
--- a/tests/integration/network_test.py
+++ b/tests/integration/network_test.py
@@ -212,6 +212,13 @@ class TestNetworks(helpers.BaseTestCase):
 
         self.execute(container, ['nslookup', 'bar'])
 
+    @requires_api_version('1.21')
+    def test_create_check_duplicate(self):
+        net_name, net_id = self.create_network()
+        with self.assertRaises(docker.errors.APIError):
+            self.client.create_network(net_name, check_duplicate=True)
+        self.client.create_network(net_name, check_duplicate=False)
+
     @requires_api_version('1.22')
     def test_connect_with_links(self):
         net_name, net_id = self.create_network()