diff --git a/watcher/api/controllers/v1/__init__.py b/watcher/api/controllers/v1/__init__.py
index b3250bee8..8d5d711f7 100644
--- a/watcher/api/controllers/v1/__init__.py
+++ b/watcher/api/controllers/v1/__init__.py
@@ -250,7 +250,8 @@ class Controller(rest.RestController):
 
         # assert that requested version is supported
         self._check_version(v, pecan.response.headers)
-        pecan.response.headers[base.Version.string] = str(v)
+        pecan.response.headers[base.Version.string] = (
+            ' '.join([versions.service_type_string(), str(v)]))
         pecan.request.version = v
 
         return super(Controller, self)._route(args, request)
diff --git a/watcher/tests/api/v1/test_microversions.py b/watcher/tests/api/v1/test_microversions.py
index 2dac17b72..c3d97493e 100644
--- a/watcher/tests/api/v1/test_microversions.py
+++ b/watcher/tests/api/v1/test_microversions.py
@@ -52,7 +52,8 @@ class TestMicroversions(api_base.FunctionalTest):
             return_json=False)
         self.assertEqual(response.headers[H_MIN_VER], MIN_VER)
         self.assertEqual(response.headers[H_MAX_VER], MAX_VER)
-        self.assertEqual(response.headers[H_RESP_VER], MIN_VER)
+        self.assertEqual(response.headers[H_RESP_VER],
+                         ' '.join([SERVICE_TYPE, MIN_VER]))
         self.assertTrue(all(x in response.json.keys() for x in
                             self.controller_list_response))
 
@@ -60,7 +61,8 @@ class TestMicroversions(api_base.FunctionalTest):
         response = self.get_json('/', return_json=False)
         self.assertEqual(response.headers[H_MIN_VER], MIN_VER)
         self.assertEqual(response.headers[H_MAX_VER], MAX_VER)
-        self.assertEqual(response.headers[H_RESP_VER], MIN_VER)
+        self.assertEqual(response.headers[H_RESP_VER],
+                         ' '.join([SERVICE_TYPE, MIN_VER]))
         self.assertTrue(all(x in response.json.keys() for x in
                             self.controller_list_response))
 
@@ -72,7 +74,8 @@ class TestMicroversions(api_base.FunctionalTest):
             return_json=False)
         self.assertEqual(response.headers[H_MIN_VER], MIN_VER)
         self.assertEqual(response.headers[H_MAX_VER], MAX_VER)
-        self.assertEqual(response.headers[H_RESP_VER], '1.1')
+        self.assertEqual(response.headers[H_RESP_VER],
+                         ' '.join([SERVICE_TYPE, '1.1']))
         self.assertTrue(all(x in response.json.keys() for x in
                             self.controller_list_response))
 
@@ -84,7 +87,8 @@ class TestMicroversions(api_base.FunctionalTest):
             return_json=False)
         self.assertEqual(response.headers[H_MIN_VER], MIN_VER)
         self.assertEqual(response.headers[H_MAX_VER], MAX_VER)
-        self.assertEqual(response.headers[H_RESP_VER], MAX_VER)
+        self.assertEqual(response.headers[H_RESP_VER],
+                         ' '.join([SERVICE_TYPE, MAX_VER]))
         self.assertTrue(all(x in response.json.keys() for x in
                             self.controller_list_response))