diff --git a/src/webui/www/private/scripts/client.js b/src/webui/www/private/scripts/client.js
index 5d77a5985..94b9ec558 100644
--- a/src/webui/www/private/scripts/client.js
+++ b/src/webui/www/private/scripts/client.js
@@ -320,7 +320,7 @@ window.addEvent('load', function() {
             return true;
         }
         const categoryHash = genHash(category);
-        if (category_list[categoryHash] === null) // This should not happen
+        if (!category_list[categoryHash]) // This should not happen
             category_list[categoryHash] = {
                 name: category,
                 torrents: []