diff --git a/erpnext/selling/doctype/customer/customer.py b/erpnext/selling/doctype/customer/customer.py
index e7c7b3adf48..44859a1410d 100644
--- a/erpnext/selling/doctype/customer/customer.py
+++ b/erpnext/selling/doctype/customer/customer.py
@@ -65,7 +65,7 @@ class Customer(TransactionBase):
 			for percentage in self.sales_team:
 				allocated_percentage += percentage.allocated_percentage
 
-			if not allocated_percentage == 100:
+			if sum([member.allocated_percentage for member in self.sales_team]) != 100:
 				frappe.throw(_("Total contribution percentage should be equal to 100"))
 
 	def check_customer_group_change(self):