diff --git a/apps/sleepphasealarm/settings.js b/apps/sleepphasealarm/settings.js
index e72d95e7f..29e3d33c9 100644
--- a/apps/sleepphasealarm/settings.js
+++ b/apps/sleepphasealarm/settings.js
@@ -90,7 +90,7 @@
     E.showMenu({
       "" : { "title" : "SleepPhaseAlarm" },
       'Keep alarm enabled': {
-        value: !config.settings.disableAlarm,
+        value: !!config.settings.disableAlarm,
         onchange: v => {
           config.settings.disableAlarm = !v;
           writeSettings();