Chromium Code Reviews| Index: rietveld.py | 
| diff --git a/rietveld.py b/rietveld.py | 
| index 0cf6ed12f6de3531e9d56112641732e7f6ca60ff..4c4e8a3d7ba17c48d8f7260a4942e6aaf25d8232 100644 | 
| --- a/rietveld.py | 
| +++ b/rietveld.py | 
| @@ -48,7 +48,7 @@ class Rietveld(object): | 
| self.rpc_server = upload.HttpRpcServer( | 
| self.url, | 
| get_creds, | 
| - extra_headers=extra_headers) | 
| + extra_headers=extra_headers or {}) | 
| else: | 
| self.rpc_server = upload.GetRpcServer(url, email) | 
| self._xsrf_token = None |