diff --git a/erpnext/hr/doctype/salary_slip/salary_slip.py b/erpnext/hr/doctype/salary_slip/salary_slip.py
index 1bceff7..3ffa4dd 100644
--- a/erpnext/hr/doctype/salary_slip/salary_slip.py
+++ b/erpnext/hr/doctype/salary_slip/salary_slip.py
@@ -84,6 +84,7 @@
 			if d.amount_based_on_formula:
 				if d.formula:
 					amount = eval(d.formula, None, data)
+			if amount:		
 				data[d.abbr] = amount
 			return amount