diff --git a/erpnext/manufacturing/doctype/work_order/work_order.py b/erpnext/manufacturing/doctype/work_order/work_order.py
index a4285753f62..5bde3e9ddfa 100644
--- a/erpnext/manufacturing/doctype/work_order/work_order.py
+++ b/erpnext/manufacturing/doctype/work_order/work_order.py
@@ -2130,7 +2130,7 @@ def make_stock_reservation_entries(
 
 
 @frappe.whitelist()
-def cancel_stock_reservation_entries(doc, sre_list):
+def cancel_stock_reservation_entries(doc: str | dict, sre_list: str | list):
 	if isinstance(doc, str):
 		doc = parse_json(doc)
 		doc = frappe.get_doc("Work Order", doc.get("name"))