diff --git a/zipline/data/minute_bars.py b/zipline/data/minute_bars.py
index 52f95b85..f1f18603 100644
--- a/zipline/data/minute_bars.py
+++ b/zipline/data/minute_bars.py
@@ -454,7 +454,7 @@ class BcolzMinuteBarReader(object):
         """
         self._rootdir = rootdir
 
-        metadata = BcolzMinuteBarMetadata.read(self._rootdir)
+        metadata = self._get_metadata()
 
         self._first_trading_day = metadata.first_trading_day
         self._minute_index = metadata.minute_index