diff --git a/zipline/data/data_portal.py b/zipline/data/data_portal.py
index abc2cb2f..731946f6 100644
--- a/zipline/data/data_portal.py
+++ b/zipline/data/data_portal.py
@@ -922,10 +922,6 @@ class DataPortal(object):
         -------
         A numpy array with requested values.
         """
-        return self._get_minute_window_data(assets, field, minutes_for_window)
-
-    def _get_minute_window_data(
-            self, assets, field, minutes_for_window):
         return self._minute_history_loader.history(assets,
                                                    minutes_for_window,
                                                    field,