diff --git a/hshetl/entities.py b/hshetl/entities.py
index e571d2271d1af03d1dd616dd6e494a30515fc419..8518306a61548375a5111cf5fcf352f51482c307 100644
--- a/hshetl/entities.py
+++ b/hshetl/entities.py
@@ -347,6 +347,8 @@ class PropertyConverter(object):
             return bin(value)
         elif type(value) == str and value == '':
             return value
+        else:
+            return buffer(value)
 
 
 class Record(object):