diff --git a/tailbone/views/master.py b/tailbone/views/master.py
index f2d78b80..0d322da3 100644
--- a/tailbone/views/master.py
+++ b/tailbone/views/master.py
@@ -39,8 +39,9 @@ from sqlalchemy import orm
 import sqlalchemy_continuum as continuum
 from sqlalchemy_utils.functions import get_primary_keys, get_columns
 
+from wuttjamaican.util import get_class_hierarchy
 from rattail.db.continuum import model_transaction_query
-from rattail.util import simple_error, get_class_hierarchy
+from rattail.util import simple_error
 from rattail.threads import Thread
 from rattail.csvutil import UnicodeDictWriter
 from rattail.excel import ExcelWriter