diff --git a/templates/sidebar/room-search-widget.php b/templates/sidebar/room-search-widget.php
index 5663c11aefe739730057f372d318b57f9ed630be..f0b22c82f4f35fa04db84f16793cfdcd84197640 100644
--- a/templates/sidebar/room-search-widget.php
+++ b/templates/sidebar/room-search-widget.php
@@ -1,5 +1,6 @@
 <form class="default room-search-form" action="<?= $action_link ?>"
       method="get">
+    <button hidden name="room_search"></button>
 
     <ul class="criteria-list">
         <?= $this->render_partial(