diff --git a/erpnext/crm/doctype/lead/lead.py b/erpnext/crm/doctype/lead/lead.py
index 44a919d8927..cf9a7f02f9d 100644
--- a/erpnext/crm/doctype/lead/lead.py
+++ b/erpnext/crm/doctype/lead/lead.py
@@ -323,7 +323,8 @@ 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")
 
 	doclist = get_mapped_doc(
 		"Lead",