diff --git a/views/dashboard/setting.ejs b/views/dashboard/setting.ejs
index 118fd54..1e52c05 100644
--- a/views/dashboard/setting.ejs
+++ b/views/dashboard/setting.ejs
@@ -8,7 +8,7 @@
         <select name="tty" id="tty">
           <option value="">選擇裝置</option>
           <% for(let i of ttys) { %>
-            <option value="<%= i %>" <%= ttys[i] == defConfig.printer.serial ? 'selected' : '' %>><%= i %></option>
+            <option value="<%= i %>" <%= i == defConfig.printer.serial ? 'selected' : '' %>><%= i %></option>
           <% } %>
         </select>
       </div>