diff --git a/erpnext/crm/doctype/lead/lead.js b/erpnext/crm/doctype/lead/lead.js
index 325ee3d8d6e..6398a9425b0 100644
--- a/erpnext/crm/doctype/lead/lead.js
+++ b/erpnext/crm/doctype/lead/lead.js
@@ -2,8 +2,9 @@
 // License: GNU General Public License v3. See license.txt
 
 frappe.provide("erpnext");
-cur_frm.email_field = "email_id";
-
+if (this.frm) {
+	this.frm.email_field = "email_id";
+}
 erpnext.LeadController = class LeadController extends frappe.ui.form.Controller {
 	setup() {
 		this.frm.make_methods = {
@@ -238,5 +239,6 @@ erpnext.LeadController = class LeadController extends frappe.ui.form.Controller
 		crm_activities.refresh();
 	}
 };
-
-extend_cscript(cur_frm.cscript, new erpnext.LeadController({ frm: cur_frm }));
+if (this.frm) {
+	extend_cscript(this.frm.cscript, new erpnext.LeadController({ frm: this.frm }));
+}