diff --git a/erpnext/accounts/doctype/bank_reconciliation_tool/bank_reconciliation_tool.py b/erpnext/accounts/doctype/bank_reconciliation_tool/bank_reconciliation_tool.py
index 2c2898199de..99f046069d0 100644
--- a/erpnext/accounts/doctype/bank_reconciliation_tool/bank_reconciliation_tool.py
+++ b/erpnext/accounts/doctype/bank_reconciliation_tool/bank_reconciliation_tool.py
@@ -1078,7 +1078,7 @@ def reconcile_vouchers(bank_transaction_name: str | int, vouchers: str, is_new_v
 @frappe.whitelist()
 def get_linked_payments(
 	bank_transaction_name: str | int,
-	document_types: list[str] | None = None,
+	document_types: str | list[str] | None = None,
 	from_date: str | date | None = None,
 	to_date: str | date | None = None,
 	filter_by_reference_date: bool | None = None,