diff --git a/lib/hooks/theme.js b/lib/hooks/theme.js
--- a/lib/hooks/theme.js
+++ b/lib/hooks/theme.js
@@ -48,12 +48,10 @@
       if (themePreference === globalThemeInfo.preference) {
         return;
       }
-
-      let theme = themePreference;
-      if (themePreference === 'system') {
-        theme = globalThemeInfo.systemTheme;
-      }
-
+      const theme =
+        themePreference === 'system'
+          ? globalThemeInfo.systemTheme
+          : themePreference;
       dispatch({
         type: updateThemeInfoActionType,
         payload: {