diff --git a/tests/utils/test_events.py b/tests/utils/test_events.py
index d617d9c5..76d456f6 100644
--- a/tests/utils/test_events.py
+++ b/tests/utils/test_events.py
@@ -281,9 +281,9 @@ class TestStatelessRules(RuleTestCase):
     def test_BeforeClose(self, ms):
         ms = list(ms)
         should_trigger = BeforeClose(hours=1, minutes=5).should_trigger
-        for m in ms[0:-65]:
+        for m in ms[0:-66]:
             self.assertFalse(should_trigger(m))
-        for m in ms[-65:]:
+        for m in ms[-66:]:
             self.assertTrue(should_trigger(m))
 
     def test_NotHalfDay(self):
diff --git a/zipline/utils/events.py b/zipline/utils/events.py
index f7bcc1a5..f51d36c4 100644
--- a/zipline/utils/events.py
+++ b/zipline/utils/events.py
@@ -359,7 +359,7 @@ class BeforeClose(StatelessRule):
         self._dt = None
 
     def should_trigger(self, dt):
-        return self._get_close(dt) - self.offset < dt
+        return self._get_close(dt) - self.offset <= dt
 
     def _get_close(self, dt):
         """