diff --git a/oslo_middleware/sizelimit.py b/oslo_middleware/sizelimit.py
index bba9886..026b709 100644
--- a/oslo_middleware/sizelimit.py
+++ b/oslo_middleware/sizelimit.py
@@ -89,7 +89,7 @@ class RequestBodySizeLimiter(base.ConfigurableMiddleware):
                 req.content_length > max_size):
             msg = _("Request is too large.")
             raise webob.exc.HTTPRequestEntityTooLarge(explanation=msg)
-        if req.content_length is None and req.is_body_readable:
+        if req.content_length is None:
             limiter = LimitingReader(req.body_file, max_size)
             req.body_file = limiter
         return self.application
diff --git a/oslo_middleware/tests/test_sizelimit.py b/oslo_middleware/tests/test_sizelimit.py
index 42622ae..3d57a61 100644
--- a/oslo_middleware/tests/test_sizelimit.py
+++ b/oslo_middleware/tests/test_sizelimit.py
@@ -100,9 +100,3 @@ class TestRequestBodySizeLimiter(test_base.BaseTestCase):
         self.request.body = b"0" * (self.MAX_REQUEST_BODY_SIZE + 1)
         response = self.request.get_response(self.middleware)
         self.assertEqual(413, response.status_int)
-
-    def test_request_too_large_no_content_length(self):
-        self.request.body = b"0" * (self.MAX_REQUEST_BODY_SIZE + 1)
-        self.request.headers['Content-Length'] = None
-        response = self.request.get_response(self.middleware)
-        self.assertEqual(413, response.status_int)