diff --git a/public/js/plugin-download.js b/public/js/plugin-download.js
index 2346fe2..11c047c 100644
--- a/public/js/plugin-download.js
+++ b/public/js/plugin-download.js
@@ -70,7 +70,7 @@ const buildTable = (chapters) => {
 	const rows = chapters.map(ch => {
 		const tds = Object.values(ch).map(v => {
 			const maxLength = 40;
-			const shouldShrink = v.length > maxLength;
+			const shouldShrink = v && v.length > maxLength;
 			const content = shouldShrink ? `<span title="${v}">${v.substring(0, maxLength)}...</span><div uk-dropdown><span>${v}</span></div>` : v;
 			return `<td>${content}</td>`
 		}).join('');