diff --git a/erpnext/setup/doctype/sms_settings/sms_settings.py b/erpnext/setup/doctype/sms_settings/sms_settings.py
index ac687a9..a9afacf 100644
--- a/erpnext/setup/doctype/sms_settings/sms_settings.py
+++ b/erpnext/setup/doctype/sms_settings/sms_settings.py
@@ -7,6 +7,11 @@
 from frappe import _, throw, msgprint
 from frappe.utils import cstr, nowdate
 
+from frappe.model.document import Document
+
+class SMSSettings(Document):
+	pass
+
 def validate_receiver_nos(receiver_list):
 	validated_receiver_list = []
 	for d in receiver_list: