diff --git a/RIGS/versioning.py b/RIGS/versioning.py
index f9056abf..cd99d353 100644
--- a/RIGS/versioning.py
+++ b/RIGS/versioning.py
@@ -25,7 +25,7 @@ class FieldComparison(object):
         self._new = new
 
     def display_value(self, value):
-        if isinstance(self.field, IntegerField) and len(self.field.choices) > 0:
+        if isinstance(self.field, IntegerField) and self.field.choices is not None and len(self.field.choices) > 0:
             return [x[1] for x in self.field.choices if x[0] == value][0]
         if self.field.name == "risk_assessment_edit_url":
             return "completed" if value else ""