diff --git a/main.lua b/main.lua
index 85defa3..8b0d1b1 100755
--- a/main.lua
+++ b/main.lua
@@ -13,8 +13,8 @@ local template = etlua.compile[[
     <title>Annwan's CGI scripts</title>
 </head>
 <body>
-    <% if app and app ~= nil then %>
-        <p>No such application: <b><%= app -%></p>
+    <% if app and app ~= "" then %>
+        <p>No such application: <b><%= app -%></b></p>
     <% end %>
     <h1>Available Applications</h1>
     <ul>
