diff --git a/browser/main/lib/ThemeManager.js b/browser/main/lib/ThemeManager.js
index b2dc9b1c..0cab6c2d 100644
--- a/browser/main/lib/ThemeManager.js
+++ b/browser/main/lib/ThemeManager.js
@@ -1,6 +1,6 @@
 function choose (ui) {
   console.log(ui.enableScheduleTheme)
-  if (ui.enableScheduleTheme !== 'on') {
+  if (!ui.enableScheduleTheme) {
     return
   }
 
diff --git a/browser/main/modals/PreferencesModal/UiTab.js b/browser/main/modals/PreferencesModal/UiTab.js
index c87b1d7b..463788c7 100644
--- a/browser/main/modals/PreferencesModal/UiTab.js
+++ b/browser/main/modals/PreferencesModal/UiTab.js
@@ -69,7 +69,7 @@ class UiTab extends React.Component {
       ui: {
         theme: this.refs.uiTheme.value,
         defaultTheme: this.refs.uiTheme.value,
-        enableScheduleTheme: this.refs.enableScheduleTheme.value,
+        enableScheduleTheme: this.refs.enableScheduleTheme.checked,
         scheduledTheme: this.refs.uiScheduledTheme.value,
         scheduleStart: this.refs.scheduleStart.value,
         scheduleEnd: this.refs.scheduleEnd.value,