diff --git a/packages/web_ui/src/components/UsersPage.jsx b/packages/web_ui/src/components/UsersPage.jsx
index cc5a1390..3bed4ec5 100644
--- a/packages/web_ui/src/components/UsersPage.jsx
+++ b/packages/web_ui/src/components/UsersPage.jsx
@@ -111,7 +111,7 @@ export default function UsersPage() {
 					title: "Last seen",
 					key: "lastSeen",
 					render: user => formatLastSeen(user),
-					sorter: sortLastSeen,
+					sorter: (a, b) => sortLastSeen(a, b),
 					responsive: ["lg"],
 				},
 			]}