diff --git a/composer/report/field.py b/composer/report/field.py
index 6257e00..8a26040 100644
--- a/composer/report/field.py
+++ b/composer/report/field.py
@@ -44,6 +44,7 @@ class Field(Component):
     storeData = True
     renderer = 'standard'
     operator = 'in'
+    cssClass = ''
 
     executionSteps = ['query', 'sort', 'output']    # , 'totals']