diff --git a/frappe/core/doctype/file/file.js b/frappe/core/doctype/file/file.js
index 62298fe809..6d77cb91ad 100644
--- a/frappe/core/doctype/file/file.js
+++ b/frappe/core/doctype/file/file.js
@@ -23,7 +23,7 @@ frappe.ui.form.on("File", "refresh", function(frm) {
 		wrapper.empty();
 	}
 
-	if(frm.doc.file_name.split('.').splice(-1)[0]==='zip') {
+	if(frm.doc.file_name && frm.doc.file_name.split('.').splice(-1)[0]==='zip') {
 		frm.add_custom_button(__('Unzip'), function() {
 			frappe.call({
 				method: "frappe.core.doctype.file.file.unzip_file",