diff --git a/www/conservancy/static/supporter/index.html b/www/conservancy/static/supporter/index.html
index fd69d55d..68884d94 100644
--- a/www/conservancy/static/supporter/index.html
+++ b/www/conservancy/static/supporter/index.html
@@ -181,9 +181,9 @@ internal policies</a> are published and available for scrutiny.</p>
                       <input type="radio" checked="checked" name="os1" value="joinListYes" />Yes
                       <input type="radio" name="os1" value="joinListNo" />No<br/>
                       <label for="fosdem15"><strong>Attending FOSDEM 2015 Event on Friday 30 January 2015?</strong></label>
-                      <input type="hidden" name="on3" id="on3" value="fosdem15"/>
-                      <input type="radio" name="os3" value="fosdem15Yes" />Yes
-                      <input type="radio" checked="checked" name="os3" value="fosdem15No" />No
+                      <input type="hidden" name="on2" id="on2" value="fosdem15"/>
+                      <input type="radio" name="os2" value="fosdem15Yes" />Yes
+                      <input type="radio" checked="checked" name="os2" value="fosdem15No" />No
                       <br />
                       <br /></div>
                       <div id="annual" class="supporter-form-submit">