diff --git a/vizro-core/src/vizro/static/js/models/dashboard.js b/vizro-core/src/vizro/static/js/models/dashboard.js
index ceddcb510..9d2fb1437 100644
--- a/vizro-core/src/vizro/static/js/models/dashboard.js
+++ b/vizro-core/src/vizro/static/js/models/dashboard.js
@@ -1,3 +1,3 @@
-export function _update_dashboard_theme(on) {
-  return on ? "vizro_light" : "vizro_dark";
+export function _update_dashboard_theme(checked) {
+  return checked ? "vizro_light" : "vizro_dark";
 }