diff --git a/swingtix/bookkeeper/models.py b/swingtix/bookkeeper/models.py
index <HASH>..<HASH> 100644
--- a/swingtix/bookkeeper/models.py
+++ b/swingtix/bookkeeper/models.py
@@ -94,7 +94,8 @@ class Account(models.Model, _AccountApi):
 
     positive_credit = models.BooleanField(
         """credit entries increase the value of this account.  Set to False for
-        Asset & Expense accounts, True for Liability, Revenue and Equity accounts.""")
+        Asset & Expense accounts, True for Liability, Revenue and Equity accounts.""",
+        default=False)
 
     name = models.TextField() #slugish?  Unique?
     description = models.TextField(blank=True)
Resolution of that part of SwingTix/bookkeeper/#4

The relevant warning message was : "BooleanField does not have a default
value".

I provided a default of False as that was the default for a BooleanField
before you were asked to make an explicit default.