diff --git a/erpnext/selling/doctype/customer/customer.py b/erpnext/selling/doctype/customer/customer.py
index 892639403f2..295f34d0c55 100644
--- a/erpnext/selling/doctype/customer/customer.py
+++ b/erpnext/selling/doctype/customer/customer.py
@@ -61,7 +61,7 @@ class Customer(TransactionBase):
 				self.loyalty_program_tier = customer.loyalty_program_tier
 
 		if self.sales_team:
-			if sum([member.allocated_percentage for member in self.sales_team]) != 100:
+			if sum([member.allocated_percentage or 0 for member in self.sales_team]) != 100:
 				frappe.throw(_("Total contribution percentage should be equal to 100"))
 
 	def check_customer_group_change(self):