diff --git a/bijoe/engine.py b/bijoe/engine.py
index e4b5bbf..daa21cd 100644
--- a/bijoe/engine.py
+++ b/bijoe/engine.py
@@ -222,6 +222,7 @@ class SchemaJSONDimension(schemas.Dimension):
     type = 'string'
 
     def __init__(self, json_field, name):
+        super(SchemaJSONDimension, self).__init__()
         name = str(name)
         self.name = name
         self.label = name.title()