diff --git a/erpnext/crm/doctype/lead/lead.py b/erpnext/crm/doctype/lead/lead.py
index 1e9a224d044..a727ca3fead 100644
--- a/erpnext/crm/doctype/lead/lead.py
+++ b/erpnext/crm/doctype/lead/lead.py
@@ -327,7 +327,8 @@ def _make_customer(source_name, target_doc=None, ignore_permissions=False):
 			target.customer_type = "Individual"
 			target.customer_name = source.lead_name
 
-		target.customer_group = frappe.db.get_default("Customer Group")
+		if not target.customer_group:
+			target.customer_group = frappe.db.get_default("Customer Group")
 
 		address = get_default_address("Lead", source.name)
 		contact = get_default_contact("Lead", source.name)