diff --git a/superset/views/core.py b/superset/views/core.py
index 06a85251d0a0c..3a78dab8cbf4e 100755
--- a/superset/views/core.py
+++ b/superset/views/core.py
@@ -1131,7 +1131,7 @@ def generate_json(self, datasource_type, datasource_id, form_data,
     @expose('/slice_json/<slice_id>')
     def slice_json(self, slice_id):
         try:
-            form_data, slc = self.get_form_data(slice_id)
+            form_data, slc = self.get_form_data(slice_id, use_slice_data=True)
             datasource_type = slc.datasource.type
             datasource_id = slc.datasource.id