diff --git a/schedula/utils/base.py b/schedula/utils/base.py
index d01bbf570..3bb9ac895 100644
--- a/schedula/utils/base.py
+++ b/schedula/utils/base.py
@@ -212,7 +212,7 @@ def form(self, depth=1, node_data=NONE, node_function=NONE, directory=None,
                 if '/' not in d and '/index' in d:
                     d['/'] = d['/index']
                 elif not d:
-                    methods[k] = sh.NONE
+                    methods[k] = NONE
         methods.update({
             'get_form_context': get_context,
             'get_form_data': get_data