diff --git a/tests/test_history.py b/tests/test_history.py
index fa2bd787..b205e34a 100644
--- a/tests/test_history.py
+++ b/tests/test_history.py
@@ -859,6 +859,23 @@ class MinuteEquityHistoryTestCase(HistoryTestCaseBase):
         # last 5 minutes should not be adjusted
         np.testing.assert_array_equal(np.array(range(782, 787)), window3[395:])
 
+    def test_passing_iterable_to_history_regular_hours(self):
+        # regular hours
+        current_dt = pd.Timestamp("2015-01-06 9:45", tz='US/Eastern')
+        bar_data = BarData(self.data_portal, lambda: current_dt, "minute")
+
+        bar_data.history(pd.Index([self.ASSET1, self.ASSET2]),
+                         "high", 5, "1m")
+
+    def test_passing_iterable_to_history_bts(self):
+        # before market hours
+        current_dt = pd.Timestamp("2015-01-07 8:45", tz='US/Eastern')
+        bar_data = BarData(self.data_portal, lambda: current_dt, "minute")
+
+        with handle_non_market_minutes(bar_data):
+            bar_data.history(pd.Index([self.ASSET1, self.ASSET2]),
+                             "high", 5, "1m")
+
     def test_overnight_adjustments(self):
         # Should incorporate adjustments on midnight 01/06
         current_dt = pd.Timestamp("2015-01-06 8:45", tz='US/Eastern')
diff --git a/zipline/data/data_portal.py b/zipline/data/data_portal.py
index 7fff4ac2..9db60e5c 100644
--- a/zipline/data/data_portal.py
+++ b/zipline/data/data_portal.py
@@ -785,7 +785,7 @@ class DataPortal(object):
         -------
         The list of adjustments for the asset(s)
         """
-        if not isinstance(assets, (list, tuple)):
+        if isinstance(assets, Asset):
             assets = [assets]
 
         adjustment_ratios_per_asset = []