diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index 97ee990368..8140c9fff9 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -398,7 +398,8 @@ X-Container-Meta-Access-Control-Expose-Headers:
     - All “simple response headers” as listed on
       `http://www.w3.org/TR/cors/#simple-response-header
       <http://www.w3.org/TR/cors/#simple-response-header>`_.
-    - The headers ``etag``, ``x-timestamp``, ``x-trans-id``.
+    - The headers ``etag``, ``x-timestamp``, ``x-trans-id``,
+      ``x-openstack-request-id``.
     - All metadata headers (``X-Container-Meta-*`` for containers and
       ``X-Object-Meta-*`` for objects).
     - headers listed in ``X-Container-Meta-Access-Control-Expose-Headers``.
diff --git a/doc/source/cors.rst b/doc/source/cors.rst
index 3dc07d3e3a..e8b07819d8 100644
--- a/doc/source/cors.rst
+++ b/doc/source/cors.rst
@@ -43,7 +43,8 @@ returns the following values for this header,
 
 * "simple response headers" as listed on
   http://www.w3.org/TR/cors/#simple-response-header
-* the headers ``etag``, ``x-timestamp``, ``x-trans-id``
+* the headers ``etag``, ``x-timestamp``, ``x-trans-id``,
+  ``x-openstack-request-id``
 * all metadata headers (``X-Container-Meta-*`` for containers and
   ``X-Object-Meta-*`` for objects)
 * headers listed in ``X-Container-Meta-Access-Control-Expose-Headers``
diff --git a/swift/proxy/controllers/base.py b/swift/proxy/controllers/base.py
index c5e8ebd08f..be98bc15dd 100644
--- a/swift/proxy/controllers/base.py
+++ b/swift/proxy/controllers/base.py
@@ -239,7 +239,7 @@ def cors_validation(func):
                 expose_headers = set([
                     'cache-control', 'content-language', 'content-type',
                     'expires', 'last-modified', 'pragma', 'etag',
-                    'x-timestamp', 'x-trans-id'])
+                    'x-timestamp', 'x-trans-id', 'x-openstack-request-id'])
                 for header in resp.headers:
                     if header.startswith('X-Container-Meta') or \
                             header.startswith('X-Object-Meta'):
diff --git a/test/unit/proxy/test_server.py b/test/unit/proxy/test_server.py
index 290086205e..393d007da3 100644
--- a/test/unit/proxy/test_server.py
+++ b/test/unit/proxy/test_server.py
@@ -5221,11 +5221,11 @@ class TestObjectController(unittest.TestCase):
         exposed = set(
             h.strip() for h in
             resp.headers['access-control-expose-headers'].split(','))
-        expected_exposed = set(['cache-control', 'content-language',
-                                'content-type', 'expires', 'last-modified',
-                                'pragma', 'etag', 'x-timestamp',
-                                'x-trans-id', 'x-object-meta-color',
-                                'x-object-meta-color-ex'])
+        expected_exposed = set([
+            'cache-control', 'content-language', 'content-type', 'expires',
+            'last-modified', 'pragma', 'etag', 'x-timestamp', 'x-trans-id',
+            'x-openstack-request-id', 'x-object-meta-color',
+            'x-object-meta-color-ex'])
         self.assertEqual(expected_exposed, exposed)
 
         # test allow_origin *
@@ -5272,10 +5272,10 @@ class TestObjectController(unittest.TestCase):
         exposed = set(
             h.strip() for h in
             resp.headers['access-control-expose-headers'].split(','))
-        expected_exposed = set(['cache-control', 'content-language',
-                                'content-type', 'expires', 'last-modified',
-                                'pragma', 'etag', 'x-timestamp',
-                                'x-trans-id', 'x-object-meta-color'])
+        expected_exposed = set([
+            'cache-control', 'content-language', 'content-type', 'expires',
+            'last-modified', 'pragma', 'etag', 'x-timestamp', 'x-trans-id',
+            'x-openstack-request-id', 'x-object-meta-color'])
         self.assertEqual(expected_exposed, exposed)
 
         # test allow_origin empty
@@ -7534,10 +7534,10 @@ class TestContainerController(unittest.TestCase):
             exposed = set(
                 h.strip() for h in
                 resp.headers['access-control-expose-headers'].split(','))
-            expected_exposed = set(['cache-control', 'content-language',
-                                    'content-type', 'expires', 'last-modified',
-                                    'pragma', 'etag', 'x-timestamp',
-                                    'x-trans-id', 'x-container-meta-color'])
+            expected_exposed = set([
+                'cache-control', 'content-language', 'content-type', 'expires',
+                'last-modified', 'pragma', 'etag', 'x-timestamp', 'x-trans-id',
+                'x-openstack-request-id', 'x-container-meta-color'])
             self.assertEqual(expected_exposed, exposed)
 
     def _gather_x_account_headers(self, controller_call, req, *connect_args,