diff --git a/packages/ui-default/templates/contest_manage.html b/packages/ui-default/templates/contest_manage.html
index a2b2185da..f9fe35567 100644
--- a/packages/ui-default/templates/contest_manage.html
+++ b/packages/ui-default/templates/contest_manage.html
@@ -56,7 +56,7 @@
                value:''
              }) }}
           <div class="row"><div class="columns">
-            <button type="submit" class="rounded primary button">
+            <button name="operation" value="broadcast" type="submit" class="rounded primary button">
               {{ _('Send') }}
             </button>
           </div></div>