diff --git a/erpnext/projects/doctype/project/project.js b/erpnext/projects/doctype/project/project.js
index 5862963496..3570a0f2be 100644
--- a/erpnext/projects/doctype/project/project.js
+++ b/erpnext/projects/doctype/project/project.js
@@ -18,7 +18,7 @@ frappe.ui.form.on("Project", {
 		};
 	},
 	onload: function (frm) {
-		var so = frm.get_docfield("Project", "sales_order");
+		var so = frappe.meta.get_docfield("Project", "sales_order");
 		so.get_route_options_for_new_doc = function (field) {
 			if (frm.is_new()) return;
 			return {
@@ -135,4 +135,4 @@ function open_form(frm, doctype, child_doctype, parentfield) {
 		frappe.ui.form.make_quick_entry(doctype, null, null, new_doc);
 	});
 
-}
+}
\ No newline at end of file