diff --git a/code/client/munkilib/prefs.py b/code/client/munkilib/prefs.py
index 16b18ad1..83fba777 100644
--- a/code/client/munkilib/prefs.py
+++ b/code/client/munkilib/prefs.py
@@ -49,6 +49,7 @@ DEFAULT_INSECURE_REPO_URL = 'http://munki/repo'
 
 DEFAULT_PREFS = {
     'AdditionalHttpHeaders': None,
+    'AggressiveUpdateNotificationDays': 14,
     'AppleSoftwareUpdatesOnly': False,
     'CatalogURL': None,
     'ClientCertificatePath': None,