diff --git a/_includes/mail-form.html b/_includes/mail-form.html
index e30dd20..72bf0a6 100644
--- a/_includes/mail-form.html
+++ b/_includes/mail-form.html
@@ -8,22 +8,22 @@
     <form action="http://list.hallada.net/subscribe" method="POST" accept-charset="utf-8">
       <div class="row clearfix">
         <div class="column half">
-          <label for="name">Name (optional)</label><br/>
-          <input type="text" name="name" id="name"/>
+          <label for="name">Name (optional)</label><br />
+          <input type="text" name="name" id="name" />
         </div>
         <div class="column half">
-          <label for="email">Email</label><br/>
-          <input type="email" name="email" id="email"/>
+          <label for="email">Email</label><br />
+          <input type="email" name="email" id="email" />
         </div>
       </div>
       <div class="row clearfix">
         <div style="display:none;">
-          <label for="hp">HP</label><br/>
-          <input type="text" name="hp" id="hp"/>
+          <label for="hp">HP</label><br />
+          <input type="text" name="hp" id="hp" />
         </div>
-        <input type="hidden" name="list" value="Q7JrUBzeCeftZqwDtxsQ9w"/>
+        <input type="hidden" name="list" value="Q7JrUBzeCeftZqwDtxsQ9w" />
         <div class="column half">
-          <input type="submit" name="submit" id="submit"/>
+          <input type="submit" name="submit" id="submit" value="Submit" />
         </div>
         <div class="column half">
           <span class="form-rss">Or subscribe to my <a href="/feed.xml">RSS feed</a></span>