diff --git a/dns/google/cloud/dns/_http.py b/dns/google/cloud/dns/_http.py
index 28c4f31cca96..d04cd1f9090a 100644
--- a/dns/google/cloud/dns/_http.py
+++ b/dns/google/cloud/dns/_http.py
@@ -19,16 +19,22 @@
 from google.cloud.dns import __version__
 
 
-_CLIENT_INFO = _http.CLIENT_INFO_TEMPLATE.format(__version__)
-
-
 class Connection(_http.JSONConnection):
     """A connection to Google Cloud DNS via the JSON REST API.
 
     :type client: :class:`~google.cloud.dns.client.Client`
     :param client: The client that owns the current connection.
+
+    :type client_info: :class:`~google.api_core.client_info.ClientInfo`
+    :param client_info: (Optional) instance used to generate user agent.
     """
 
+    def __init__(self, client, client_info=None):
+        super(Connection, self).__init__(client, client_info)
+
+        self._client_info.gapic_version = __version__
+        self._client_info.client_library_version = __version__
+
     API_BASE_URL = "https://www.googleapis.com"
     """The base of the API call URL."""
 
@@ -37,5 +43,3 @@ class Connection(_http.JSONConnection):
 
     API_URL_TEMPLATE = "{api_base_url}/dns/{api_version}{path}"
     """A template for the URL of a particular API call."""
-
-    _EXTRA_HEADERS = {_http.CLIENT_INFO_HEADER: _CLIENT_INFO}
diff --git a/dns/google/cloud/dns/client.py b/dns/google/cloud/dns/client.py
index b2f6947ee79c..4bfa112d5226 100644
--- a/dns/google/cloud/dns/client.py
+++ b/dns/google/cloud/dns/client.py
@@ -43,16 +43,23 @@ class Client(ClientWithProject):
                   ``credentials`` for the current object.
                   This parameter should be considered private, and could
                   change in the future.
+
+    :type client_info: :class:`~google.api_core.client_info.ClientInfo`
+    :param client_info:
+        The client info used to send a user-agent string along with API
+        requests. If ``None``, then default info will be used. Generally,
+        you only need to set this if you're developing your own library
+        or partner tool.
     """
 
     SCOPE = ("https://www.googleapis.com/auth/ndev.clouddns.readwrite",)
     """The scopes required for authenticating as a Cloud DNS consumer."""
 
-    def __init__(self, project=None, credentials=None, _http=None):
+    def __init__(self, project=None, credentials=None, _http=None, client_info=None):
         super(Client, self).__init__(
             project=project, credentials=credentials, _http=_http
         )
-        self._connection = Connection(self)
+        self._connection = Connection(self, client_info=client_info)
 
     def quotas(self):
         """Return DNS quotas for the project associated with this client.
diff --git a/dns/tests/unit/test__http.py b/dns/tests/unit/test__http.py
index 002abb67c364..9c5198f0a7d2 100644
--- a/dns/tests/unit/test__http.py
+++ b/dns/tests/unit/test__http.py
@@ -46,9 +46,7 @@ def test_build_api_url_w_extra_query_params(self):
 
     def test_extra_headers(self):
         import requests
-
         from google.cloud import _http as base_http
-        from google.cloud.dns import _http as MUT
 
         http = mock.create_autospec(requests.Session, instance=True)
         response = requests.Response()
@@ -65,8 +63,8 @@ def test_extra_headers(self):
 
         expected_headers = {
             "Accept-Encoding": "gzip",
-            base_http.CLIENT_INFO_HEADER: MUT._CLIENT_INFO,
-            "User-Agent": conn.USER_AGENT,
+            base_http.CLIENT_INFO_HEADER: conn.user_agent,
+            "User-Agent": conn.user_agent,
         }
         expected_uri = conn.build_api_url("/rainbow")
         http.request.assert_called_once_with(
diff --git a/dns/tests/unit/test_client.py b/dns/tests/unit/test_client.py
index af7b01355990..5ca6eec98a1f 100644
--- a/dns/tests/unit/test_client.py
+++ b/dns/tests/unit/test_client.py
@@ -38,6 +38,7 @@ def _make_one(self, *args, **kw):
         return self._get_target_class()(*args, **kw)
 
     def test_ctor(self):
+        from google.api_core.client_info import ClientInfo
         from google.cloud.dns._http import Connection
 
         creds = _make_credentials()
@@ -46,6 +47,23 @@ def test_ctor(self):
         self.assertIsInstance(client._connection, Connection)
         self.assertIs(client._connection.credentials, creds)
         self.assertIs(client._connection.http, http)
+        self.assertIsInstance(client._connection._client_info, ClientInfo)
+
+    def test_ctor_w_client_info(self):
+        from google.api_core.client_info import ClientInfo
+        from google.cloud.dns._http import Connection
+
+        client_info = ClientInfo()
+
+        creds = _make_credentials()
+        http = object()
+        client = self._make_one(
+            project=self.PROJECT, credentials=creds, _http=http, client_info=client_info
+        )
+        self.assertIsInstance(client._connection, Connection)
+        self.assertIs(client._connection.credentials, creds)
+        self.assertIs(client._connection.http, http)
+        self.assertIs(client._connection._client_info, client_info)
 
     def test_quotas_defaults(self):
         PATH = "projects/%s" % (self.PROJECT,)