diff --git a/keystoneclient/tests/v3/test_oauth1.py b/keystoneclient/tests/v3/test_oauth1.py
index d12ffdd74..ff0d83677 100644
--- a/keystoneclient/tests/v3/test_oauth1.py
+++ b/keystoneclient/tests/v3/test_oauth1.py
@@ -182,7 +182,7 @@ class RequestTokenTests(TokenTests):
         self.assertEqual(request_secret, request_token.secret)
 
         # Assert that the project id is in the header
-        self.assertRequestHeaderEqual('requested_project_id', project_id)
+        self.assertRequestHeaderEqual('requested-project-id', project_id)
         req_headers = self.requests.last_request.headers
 
         oauth_client = oauth1.Client(consumer_key,
diff --git a/keystoneclient/v3/contrib/oauth1/request_tokens.py b/keystoneclient/v3/contrib/oauth1/request_tokens.py
index bc30ce08d..33ecc3ad7 100644
--- a/keystoneclient/v3/contrib/oauth1/request_tokens.py
+++ b/keystoneclient/v3/contrib/oauth1/request_tokens.py
@@ -58,7 +58,7 @@ class RequestTokenManager(base.CrudManager):
 
     def create(self, consumer_key, consumer_secret, project):
         endpoint = utils.OAUTH_PATH + '/request_token'
-        headers = {'requested_project_id': base.getid(project)}
+        headers = {'requested-project-id': base.getid(project)}
         oauth_client = oauth1.Client(consumer_key,
                                      client_secret=consumer_secret,
                                      signature_method=oauth1.SIGNATURE_HMAC,