diff --git a/swift/common/middleware/slo.py b/swift/common/middleware/slo.py
index ac49ae65ff..4ff2d21cbc 100644
--- a/swift/common/middleware/slo.py
+++ b/swift/common/middleware/slo.py
@@ -703,7 +703,7 @@ class StaticLargeObject(object):
                     elif len(ranges) > 1:
                         problem_segments.append([quote(obj_name),
                                                  'Multiple Ranges'])
-                    elif ranges == [(0, seg_dict['size_bytes'])]:
+                    elif ranges == [(0, head_seg_resp.content_length)]:
                         # Just one range, and it exactly matches the object.
                         # Why'd we do this again?
                         seg_dict['range'] = None
diff --git a/test/unit/common/middleware/test_slo.py b/test/unit/common/middleware/test_slo.py
index b131240361..f8455a96e6 100644
--- a/test/unit/common/middleware/test_slo.py
+++ b/test/unit/common/middleware/test_slo.py
@@ -530,7 +530,7 @@ class TestSloPutManifest(SloTestCase):
     def test_handle_single_ranges(self):
         good_data = json.dumps(
             [{'path': '/checktest/a_1', 'etag': None,
-              'size_bytes': 1, 'range': '0-0'},
+              'size_bytes': None, 'range': '0-0'},
              {'path': '/checktest/b_2', 'etag': None,
               'size_bytes': 2, 'range': '-1'},
              {'path': '/checktest/b_2', 'etag': None,