diff --git a/frontend/src/Helpers/Hooks/useTheme.ts b/frontend/src/Helpers/Hooks/useTheme.ts
index 0ed620635..e2ff5da2a 100644
--- a/frontend/src/Helpers/Hooks/useTheme.ts
+++ b/frontend/src/Helpers/Hooks/useTheme.ts
@@ -6,7 +6,7 @@ import themes from 'Styles/Themes';
 
 function createThemeSelector() {
   return createSelector(
-    (state: AppState) => state.settings.ui.item.theme || window.Radarr.theme,
+    (state: AppState) => state.settings.ui.item.theme || window.Prowlarr.theme,
     (theme) => theme
   );
 }