diff --git a/src/utils/index.tsx b/src/utils/index.tsx
index 775b285..4fd19c0 100644
--- a/src/utils/index.tsx
+++ b/src/utils/index.tsx
@@ -141,7 +141,7 @@ export const getInitialTheme = (themeConfig: SanitizedThemeConfig): string => {
 
   if (
     typeof window !== 'undefined' &&
-    !(localStorage.getItem(LOCAL_STORAGE_KEY_NAME) === null)
+    localStorage.getItem(LOCAL_STORAGE_KEY_NAME) !== null
   ) {
     const savedTheme = localStorage.getItem(LOCAL_STORAGE_KEY_NAME);