diff --git a/swift/common/middleware/copy.py b/swift/common/middleware/copy.py
index 1422d66804..34bf4f0f27 100644
--- a/swift/common/middleware/copy.py
+++ b/swift/common/middleware/copy.py
@@ -498,7 +498,9 @@ class ServerSideCopyMiddleware(object):
                         source_resp.headers['X-Object-Manifest']
             sink_req.params = params
 
-        # Set data source, content length and etag for the PUT request
+        # Set swift.source, data source, content length and etag
+        # for the PUT request
+        sink_req.environ['swift.source'] = 'SSC'
         sink_req.environ['wsgi.input'] = FileLikeIter(source_resp.app_iter)
         sink_req.content_length = source_resp.content_length
         if (source_resp.status_int == HTTP_OK and
diff --git a/test/unit/common/middleware/test_copy.py b/test/unit/common/middleware/test_copy.py
index 2dba7194ad..f6453fa29f 100644
--- a/test/unit/common/middleware/test_copy.py
+++ b/test/unit/common/middleware/test_copy.py
@@ -256,6 +256,8 @@ class TestServerSideCopyMiddleware(unittest.TestCase):
         self.assertEqual('/v1/a/c/o', self.authorized[0].path)
         self.assertEqual('PUT', self.authorized[1].method)
         self.assertEqual('/v1/a/c/o2', self.authorized[1].path)
+        self.assertEqual(self.app.swift_sources[0], 'SSC')
+        self.assertEqual(self.app.swift_sources[1], 'SSC')
 
     def test_static_large_object_manifest(self):
         self.app.register('GET', '/v1/a/c/o', swob.HTTPOk,