diff --git a/erpnext/patches/v7_1/set_sales_person_status.py b/erpnext/patches/v7_1/set_sales_person_status.py
index 4eb4b25..929beac 100644
--- a/erpnext/patches/v7_1/set_sales_person_status.py
+++ b/erpnext/patches/v7_1/set_sales_person_status.py
@@ -4,4 +4,5 @@
 def execute():
 	frappe.reload_doc('setup','doctype','sales_person')
 	frappe.db.sql("""update `tabSales Person` set enabled=1 
-		where employee IN (select employee from tabEmployee where status != "Left")""")
\ No newline at end of file
+		where (employee is null or employee = '' 
+			or employee IN (select employee from tabEmployee where status != "Left"))""")