diff --git a/botocore/auth.py b/botocore/auth.py
index 194535f2aa..8b6224b93b 100644
--- a/botocore/auth.py
+++ b/botocore/auth.py
@@ -330,7 +330,7 @@ def _modify_request_before_signing(self, request):
 class S3SigV4Auth(SigV4Auth):
 
     def _modify_request_before_signing(self, request):
-        super(S3SigV4Auth, self)._add_headers_before_signing(request)
+        super(S3SigV4Auth, self)._modify_request_before_signing(request)
         request.headers['X-Amz-Content-SHA256'] = self.payload(request)
 
     def _normalize_url_path(self, path):
diff --git a/tests/unit/auth/test_signers.py b/tests/unit/auth/test_signers.py
index 8e4b3edf5a..66ee636645 100644
--- a/tests/unit/auth/test_signers.py
+++ b/tests/unit/auth/test_signers.py
@@ -124,6 +124,19 @@ def test_signature_with_date_headers(self):
              'Signature=M245fo86nVKI8rLpH4HgWs841sBTUKuwciiTpjMDgPs='))
 
 
+class TestS3SigV4Auth(unittest.TestCase):
+    def test_signature_is_not_normalized(self):
+        request = AWSRequest()
+        request.url = 'https://s3.amazonaws.com/bucket/foo/./bar/../bar'
+        request.method = 'GET'
+        credentials = botocore.credentials.Credentials('access_key',
+                                                       'secret_key')
+        auth = botocore.auth.S3SigV4Auth(credentials, 's3', 'us-east-1')
+        auth.add_auth(request)
+        self.assertTrue(
+            request.headers['Authorization'].startswith('AWS4-HMAC-SHA256'))
+
+
 class TestSigV4Presign(unittest.TestCase):
     maxDiff = None