diff --git a/magnum/api/controllers/v1/baymodel.py b/magnum/api/controllers/v1/baymodel.py
index df35cb72df..73fbf9339c 100644
--- a/magnum/api/controllers/v1/baymodel.py
+++ b/magnum/api/controllers/v1/baymodel.py
@@ -72,7 +72,7 @@ class BayModel(base.APIBase):
     master_flavor_id = wtypes.StringType(min_length=1, max_length=255)
     """The flavor of the master node for this bay model"""
 
-    dns_nameserver = wtypes.IPv4AddressType()
+    dns_nameserver = types.IPv4AddressType()
     """The DNS nameserver address"""
 
     keypair_id = wsme.wsattr(wtypes.StringType(min_length=1, max_length=255),
diff --git a/magnum/api/controllers/v1/types.py b/magnum/api/controllers/v1/types.py
index ace920b505..c5540d507d 100644
--- a/magnum/api/controllers/v1/types.py
+++ b/magnum/api/controllers/v1/types.py
@@ -15,7 +15,9 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import netaddr
 from oslo_utils import strutils
+import six
 import wsme
 from wsme import types as wtypes
 
@@ -203,3 +205,17 @@ class JsonPatchType(wtypes.Base):
         if patch.value:
             ret['value'] = patch.value
         return ret
+
+
+class IPv4AddressType(wtypes.UserType):
+    """A simple IPv4 type."""
+
+    basetype = six.string_types
+    name = "ipv4address"
+
+    @staticmethod
+    def validate(value):
+        try:
+            netaddr.IPAddress(value, version=4, flags=netaddr.INET_PTON)
+        except netaddr.AddrFormatError as e:
+            raise ValueError(six.text_type(e))
diff --git a/requirements.txt b/requirements.txt
index f68a91649c..8ccc0d3401 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,3 +27,4 @@ taskflow>=0.7.1
 WSME>=0.6
 docker-py>=1.1.0  # Apache-2.0
 jsonpatch>=1.1
+netaddr>=0.7.12