diff --git a/tailbone/views/master.py b/tailbone/views/master.py
index 98408420..5027f230 100644
--- a/tailbone/views/master.py
+++ b/tailbone/views/master.py
@@ -2141,7 +2141,7 @@ class MasterView(View):
         if self.merge_handler:
             return self.merge_handler.get_merge_preview_data(obj)
 
-        return dict([(f, getattr(obj, f))
+        return dict([(f, getattr(obj, f, None))
                      for f in self.get_merge_fields()])
 
     def get_merge_resulting_data(self, remove, keep):