diff --git a/erpnext/payroll/doctype/salary_slip/salary_slip.py b/erpnext/payroll/doctype/salary_slip/salary_slip.py
index 5442bf201c8..8103105cfa5 100644
--- a/erpnext/payroll/doctype/salary_slip/salary_slip.py
+++ b/erpnext/payroll/doctype/salary_slip/salary_slip.py
@@ -687,8 +687,8 @@ class SalarySlip(TransactionBase):
 
 		for key in ("earnings", "deductions"):
 			for d in self.get(key):
-				default_data[d.abbr] = d.default_amount
-				data[d.abbr] = d.amount
+				default_data[d.abbr] = d.default_amount or 0
+				data[d.abbr] = d.amount or 0
 
 		return data, default_data