diff --git a/singletree.py b/singletree.py
index 544fcdd..f34f54a 100644
--- a/singletree.py
+++ b/singletree.py
@@ -55,6 +55,9 @@ ui_tmpl = """
 		"parentField":"{{parentField}}",
 		"idField":"{{idField}}",
 		"textField":"{{textField}}",
+{% if typeField %}
+		"typeField":"{{typeField}}",
+{% endif %}
 {% if params %}
 		"params": {{json.dumps(params)}},
 {% endif %}