diff --git a/endpoints/notificationevent.py b/endpoints/notificationevent.py
index 8d720d986..2f7fb34fb 100644
--- a/endpoints/notificationevent.py
+++ b/endpoints/notificationevent.py
@@ -156,6 +156,9 @@ class BaseBuildEvent(NotificationEvent):
     return None
 
   def should_perform(self, event_data, notification_data):
+    if not notification_data.event_config_json:
+      return True
+
     event_config = json.loads(notification_data.event_config_json)
     ref_regex = event_config.get('ref-regex') or None
     if ref_regex is None:
diff --git a/test/test_notifications.py b/test/test_notifications.py
index 301fcea26..336670261 100644
--- a/test/test_notifications.py
+++ b/test/test_notifications.py
@@ -13,6 +13,14 @@ class TestCreate(unittest.TestCase):
 
 
 class TestShouldPerform(unittest.TestCase):
+  def test_build_emptyjson(self):
+    notification_data = AttrDict({
+      'event_config_json': None,
+    })
+
+    # No build data at all.
+    self.assertTrue(BuildSuccessEvent().should_perform({}, notification_data))
+
   def test_build_nofilter(self):
     notification_data = AttrDict({
       'event_config_json': '{}',