diff --git a/esales/models.py b/esales/models.py
index 4705ad5..0a502cd 100644
--- a/esales/models.py
+++ b/esales/models.py
@@ -20,9 +20,7 @@ class Category(object):
         if self.attributes:
             attributes = SubElement(root, "attributes")
             for k, v in self.attributes.items():
-                s = str(v)
-                if s:
-                    SubElement(attributes, k).text = s
+                SubElement(attributes, k).text = str(v)
 
         return root