diff --git a/src/gui/html/js/dom.js b/src/gui/html/js/dom.js
index 59188a03..47c2ee91 100644
--- a/src/gui/html/js/dom.js
+++ b/src/gui/html/js/dom.js
@@ -101,7 +101,7 @@
       const gameMenuItems = document.getElementById('gameMenu').children;
       for (let i = 0; i < gameMenuItems.length; ++i) {
         DOM.enable(gameMenuItems[i],
-                   installedGames.indexOf(gameMenuItems[i].getAttribute('value')) === -1);
+                   installedGames.indexOf(gameMenuItems[i].getAttribute('value')) !== -1);
       }
     }