diff --git a/googleads/adwords.py b/googleads/adwords.py
index 415bdec4..8b48f7e1 100644
--- a/googleads/adwords.py
+++ b/googleads/adwords.py
@@ -256,7 +256,7 @@ def __init__(self, developer_token, oauth2_client,
     proxy_config = kwargs.get('proxy_config')
     self.proxy_config = (proxy_config if proxy_config else
                          googleads.common.ProxyConfig())
-    self.report_download_headers = kwargs.get('report_download_headers', {})
+    self.report_download_headers = kwargs.get('report_downloader_headers', {})
     self.enable_compression = kwargs.get(
         googleads.common.ENABLE_COMPRESSION_KEY, False)