diff --git a/frigate/models.py b/frigate/models.py
index 9dbd87205..857d88eb3 100644
--- a/frigate/models.py
+++ b/frigate/models.py
@@ -6,7 +6,7 @@ from playhouse.sqlite_ext import *
 class Event(Model):
     id = CharField(null=False, primary_key=True, max_length=30)
     label = CharField(index=True, max_length=20)
-    sub_label = CharField(index=True, max_length=12, default=None),
+    sub_label = CharField(index=True, max_length=12, default=None, null=True),
     camera = CharField(index=True, max_length=20)
     start_time = DateTimeField()
     end_time = DateTimeField()