diff --git a/files/assets/js/core.js b/files/assets/js/core.js
index 701fa928dd..004efd6c9e 100644
--- a/files/assets/js/core.js
+++ b/files/assets/js/core.js
@@ -369,7 +369,7 @@ function sort_table(t) {
 		let attr;
 		if ('sortKey' in x.dataset) {
 			attr = x.dataset.sortKey;
-			if (/^[\d-,]+$/.test(x.innerHTML)) {
+			if (/^[\d-,]+$/.test(attr)) {
 				attr = parseInt(attr.replace(/,/g, ''))
 			}
 		} else if ('time' in x.dataset) {