diff --git a/app/views/dashboard/_wiki.html.erb b/app/views/dashboard/_wiki.html.erb
index 25e3c510c49..b0eda11d1ce 100644
--- a/app/views/dashboard/_wiki.html.erb
+++ b/app/views/dashboard/_wiki.html.erb
@@ -4,11 +4,16 @@
   <div class="col-lg-8 col-md-7 col-sm-7 col-xs-7">
     <div class="input-group">
       <form class="search-form-wiki" role="search" autocomplete="off">
-        <input type="text" class="search-wiki form-control input-sm" style="width:70%;" placeholder="<%= t('dashboard._wiki.search') %>">
+        <input type="text" class="search-wiki form-control input-sm" id="sidebar-searchform-input" style="width:70%;" placeholder="<%= t('dashboard._wiki.search') %>">
         <span class="input-group-btn">
           <button class="btn btn-sm btn-default" type="submit"><i class="fa fa-search"></i></button>
         </span>
       </form>
+
+      <script type="text/javascript">
+        document.getElementById("sidebar-searchform-input").setCustomValidity('Please! Type something to search');
+      </script>
+
     </div>
   </div>