diff --git a/js/ui/appFavorites.js b/js/ui/appFavorites.js
index 0bdf41b22..cc3e3c32a 100644
--- a/js/ui/appFavorites.js
+++ b/js/ui/appFavorites.js
@@ -153,7 +153,7 @@ class AppFavorites {
     }
 
     _removeFavorite(appId) {
-        if (!appId in this._favorites)
+        if (!(appId in this._favorites))
             return false;
 
         let ids = this._getIds().filter(id => id != appId);