diff --git a/packages/google-cloud-vision/google/cloud/vision/__init__.py b/packages/google-cloud-vision/google/cloud/vision/__init__.py
index 8a60ee566968..036cd9c08e53 100644
--- a/packages/google-cloud-vision/google/cloud/vision/__init__.py
+++ b/packages/google-cloud-vision/google/cloud/vision/__init__.py
@@ -14,4 +14,8 @@
 
 """Google Cloud Vision API package."""
 
+
+from pkg_resources import get_distribution
+__version__ = get_distribution('google-cloud-vision').version
+
 from google.cloud.vision.client import Client
diff --git a/packages/google-cloud-vision/google/cloud/vision/_http.py b/packages/google-cloud-vision/google/cloud/vision/_http.py
index e3a0627c80ac..cd024e7ba3dd 100644
--- a/packages/google-cloud-vision/google/cloud/vision/_http.py
+++ b/packages/google-cloud-vision/google/cloud/vision/_http.py
@@ -14,12 +14,17 @@
 
 """HTTP Client for interacting with the Google Cloud Vision API."""
 
+
 from google.cloud import _http
 
+from google.cloud.vision import __version__
 from google.cloud.vision.annotations import Annotations
 from google.cloud.vision.feature import Feature
 
 
+_CLIENT_INFO = _http.CLIENT_INFO_TEMPLATE.format(__version__)
+
+
 class Connection(_http.JSONConnection):
     """A connection to Google Cloud Vision via the JSON REST API.
 
@@ -36,6 +41,10 @@ class Connection(_http.JSONConnection):
     API_URL_TEMPLATE = '{api_base_url}/{api_version}{path}'
     """A template for the URL of a particular API call."""
 
+    _EXTRA_HEADERS = {
+        _http.CLIENT_INFO_HEADER: _CLIENT_INFO,
+    }
+
 
 class _HTTPVisionAPI(object):
     """Vision API for interacting with the JSON/HTTP version of Vision
diff --git a/packages/google-cloud-vision/unit_tests/test__http.py b/packages/google-cloud-vision/unit_tests/test__http.py
index e1fd82e57b19..92b39021fe57 100644
--- a/packages/google-cloud-vision/unit_tests/test__http.py
+++ b/packages/google-cloud-vision/unit_tests/test__http.py
@@ -38,6 +38,36 @@ def test_default_url(self):
         conn = self._make_one(client)
         self.assertEqual(conn._client, client)
 
+    def test_extra_headers(self):
+        from google.cloud import _http as base_http
+        from google.cloud.vision import _http as MUT
+
+        http = mock.Mock(spec=['request'])
+        response = mock.Mock(status=200, spec=['status'])
+        data = b'brent-spiner'
+        http.request.return_value = response, data
+        client = mock.Mock(_http=http, spec=['_http'])
+
+        conn = self._make_one(client)
+        req_data = 'req-data-boring'
+        result = conn.api_request(
+            'GET', '/rainbow', data=req_data, expect_json=False)
+        self.assertEqual(result, data)
+
+        expected_headers = {
+            'Content-Length': str(len(req_data)),
+            'Accept-Encoding': 'gzip',
+            base_http.CLIENT_INFO_HEADER: MUT._CLIENT_INFO,
+            'User-Agent': conn.USER_AGENT,
+        }
+        expected_uri = conn.build_api_url('/rainbow')
+        http.request.assert_called_once_with(
+            body=req_data,
+            headers=expected_headers,
+            method='GET',
+            uri=expected_uri,
+        )
+
 
 class Test_HTTPVisionAPI(unittest.TestCase):
     def _get_target_class(self):