diff --git a/enterprise/models.py b/enterprise/models.py
index 3e85a3a45..71a5cac19 100644
--- a/enterprise/models.py
+++ b/enterprise/models.py
@@ -4500,6 +4500,7 @@ class EnterpriseGroup(TimeStampedModel, SoftDeletableModel):
     applies_to_all_contexts = models.BooleanField(
         verbose_name="Set group membership to the entire org of learners.",
         default=False,
+        null=True,
         help_text=_(
             "When enabled, all learners connected to the org will be considered a member."
         )